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Temporal range: Jurassic–Present
Vespula germanica Richard Bartz.jpg
A social wasp, Vespula germanica
Scientific classification Red Pencil Icon.png
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Superorder: Hymenopterida
Order: Hymenoptera
Groups included
Cladistically included but traditionally excluded taxa

A wasp is any narrow-waisted insect of the order of ants, bees, wasps, and sawflies (Hymenoptera) that is neither a bee nor an ant; some of them can sting their insect prey. The wasp-waisted insects are a complete natural group with a single ancestor; wasps are not such a group, as they do not include the bees and the ants.

The most commonly known wasps, such as yellowjackets and hornets, are in the family Vespidae and are eusocial, living together in a nest with an egg-laying queen and non-reproducing workers. Eusociality is favoured by the unusual haplodiploid system of sex determination in Hymenoptera, as it makes sisters exceptionally closely related to each other. However, the majority of wasp species are solitary, with each adult female living and breeding independently. Females typically have an ovipositor for laying eggs in or near a food source for the larvae, though in the Aculeata the ovipositor is often modified instead into a sting used for defense or prey capture. Wasps play many ecological roles. Some are predators or pollinators, whether to feed themselves or to provision their nests. Many, notably the cuckoo wasps, are kleptoparasites, laying eggs in the nests of other wasps. Many of the solitary wasps are parasitoidal, meaning they lay eggs on or in other insects (any life stage from egg to adult) and often provision their own nests with such hosts. Unlike true parasites, the wasp larvae eventually kill their hosts. Solitary wasps parasitize almost every pest insect, making wasps valuable in horticulture for biological pest control of species such as whitefly in tomatoes and other crops.

Wasps first appeared in the fossil record in the Jurassic, and diversified into many surviving superfamilies by the Cretaceous. They are a successful and diverse group of insects with tens of thousands of described species; wasps have spread to all parts of the world except for the polar regions. The largest social wasp is the Asian giant hornet, at up to 5 centimetres (2.0 in) in length; among the largest solitary wasps is a group of species known as tarantula hawks, along with the giant scoliid of Indonesia ( Megascolia procer ). The smallest wasps are solitary chalcid wasps in the family Mymaridae, including the world's smallest known insect, with a body length of only 0.139 mm (0.0055 in), and the smallest known flying insect, only 0.15 mm (0.0059 in) long.

Wasps have appeared in literature from Classical times, as the eponymous chorus of old men in Aristophanes' 422 BC comedy Σφῆκες (Sphēkes), The Wasps , and in science fiction from H. G. Wells's 1904 novel The Food of the Gods and How It Came to Earth , featuring giant wasps with three-inch-long stings. The name "Wasp" has been used for many warships and other military equipment.

Taxonomy and phylogeny

Wasps are paraphyletic, consisting of the clade Apocrita without ants and bees, which are not usually considered to be wasps. The Hymenoptera also contain the somewhat wasplike Symphyta, the sawflies. The familiar common wasps and yellowjackets belong to one family, the Vespidae. Wasps are Paraphyletic.svg
Wasps are paraphyletic, consisting of the clade Apocrita without ants and bees, which are not usually considered to be wasps. The Hymenoptera also contain the somewhat wasplike Symphyta, the sawflies. The familiar common wasps and yellowjackets belong to one family, the Vespidae.

Paraphyletic grouping

The wasps are a cosmopolitan paraphyletic grouping of hundreds of thousands of species, [1] [2] consisting of the narrow-waisted Apocrita without the ants and bees. [3] The Hymenoptera also contain the somewhat wasplike but unwaisted Symphyta, the sawflies.

The term wasp is sometimes used more narrowly for members of the Vespidae, which includes several eusocial wasp lineages, such as yellowjackets (the genera Vespula and Dolichovespula ), hornets (genus Vespa), and members of the subfamily Polistinae.


Male Electrostephanus petiolatus fossil from the Middle Eocene, preserved in Baltic amber Neotype male of Electrostephanus petiolatus Brues in Baltic amber (AMNH B-JWJ-260).png
Male Electrostephanus petiolatus fossil from the Middle Eocene, preserved in Baltic amber

Hymenoptera in the form of Symphyta (Xyelidae) first appeared in the fossil record in the Lower Triassic. Apocrita, wasps in the broad sense, appeared in the Jurassic, and had diversified into many of the extant superfamilies by the Cretaceous; they appear to have evolved from the Symphyta. [4] Fig wasps with modern anatomical features first appeared in the Lower Cretaceous of the Crato Formation in Brazil, some 65 million years before the first fig trees. [5]

The Vespidae include the extinct genus Palaeovespa , seven species of which are known from the Eocene rocks of the Florissant fossil beds of Colorado and from fossilised Baltic amber in Europe. [6] Also found in Baltic amber are crown wasps of the genus Electrostephanus . [7] [8]


Wasps are a diverse group, estimated at over a hundred thousand described species around the world, and a great many more as yet undescribed. [9] [lower-alpha 1] For example, there are over 800 species of fig trees, mostly in the tropics, and almost all of these has its own specific fig wasp (Chalcidoidea) to effect pollination. [10]

Many wasp species are parasitoids; the females deposit eggs on or in a host arthropod on which the larvae then feed. Some larvae start off as parasitoids, but convert at a later stage to consuming the plant tissues that their host is feeding on. In other species, the eggs are laid directly into plant tissues and form galls, which protect the developing larvae from predators but not necessarily from other parasitic wasps. In some species, the larvae are predatory themselves; the wasp eggs are deposited in clusters of eggs laid by other insects, and these are then consumed by the developing wasp larvae. [10]

The largest social wasp is the Asian giant hornet, at up to 5 centimetres (2.0 in) in length. [11] The various tarantula hawk wasps are of a similar size [12] and can overpower a spider many times its own weight, and move it to its burrow, with a sting that is excruciatingly painful to humans. [13] The solitary giant scoliid, Megascolia procer , with a wingspan of 11.5 cm, [14] has subspecies in Sumatra and Java; [15] it is a parasitoid of the Atlas beetle Chalcosoma atlas . [16] The female giant ichneumon wasp Megarhyssa macrurus is 12.5 centimetres (5 in) long including its very long but slender ovipositor which is used for boring into wood and inserting eggs. [17] The smallest wasps are solitary chalcid wasps in the family Mymaridae, including the world's smallest known insect, Dicopomorpha echmepterygis (139 micrometres long) and Kikiki huna with a body length of only 158 micrometres, the smallest known flying insect. [18]

There are estimated to be 100,000 species of ichneumonoid wasps in the families Braconidae and Ichneumonidae. These are almost exclusively parasitoids, mostly utilising other insects as hosts. Another family, the Pompilidae, is a specialist parasitoid of spiders. [10] Some wasps are even parasitoids of parasitoids; the eggs of Euceros are laid beside lepidopteran larvae and the wasp larvae feed temporarily on their haemolymph, but if a parasitoid emerges from the host, the hyperparasites continue their life cycle inside the parasitoid. [19] Parasitoids maintain their extreme diversity through narrow specialism. In Peru, 18 wasp species were found living on 14 fly species in only two species of Gurania climbing squash. [20] [21]

Social wasps

Social wasps constructing a paper nest Active Wasp Nest.jpg
Social wasps constructing a paper nest

Of the dozens of extant wasp families, only the family Vespidae contains social species, primarily in the subfamilies Vespinae and Polistinae. With their powerful stings and conspicuous warning coloration, often in black and yellow, social wasps are frequent models for Batesian mimicry by non-stinging insects, and are themselves involved in mutually beneficial Müllerian mimicry of other distasteful insects including bees and other wasps. All species of social wasps construct their nests using some form of plant fiber (mostly wood pulp) as the primary material, though this can be supplemented with mud, plant secretions (e.g., resin), and secretions from the wasps themselves; multiple fibrous brood cells are constructed, arranged in a honeycombed pattern, and often surrounded by a larger protective envelope. Wood fibers are gathered from weathered wood, softened by chewing and mixing with saliva. The placement of nests varies from group to group; yellow jackets such as Dolichovespula media and D. sylvestris prefer to nest in trees and shrubs; Protopolybia exigua attaches its nests on the underside of leaves and branches; Polistes erythrocephalus chooses sites close to a water source. [22]

Other wasps, like Agelaia multipicta and Vespula germanica, like to nest in cavities that include holes in the ground, spaces under homes, wall cavities or in lofts. While most species of wasps have nests with multiple combs, some species, such as Apoica flavissima , only have one comb. [23] The length of the reproductive cycle depends on latitude; Polistes erythrocephalus, for example, has a much longer (up to 3 months longer) cycle in temperate regions. [24]

Solitary wasps

Potter wasp building mud nest, France. The latest ring of mud is still wet. Potter Wasp building mud nest near completion.JPG
Potter wasp building mud nest, France. The latest ring of mud is still wet.

The vast majority of wasp species are solitary insects. [10] [25] Having mated, the adult female forages alone and if it builds a nest, does so for the benefit of its own offspring. Some solitary wasps nest in small groups alongside others of their species, but each is involved in caring for its own offspring (except for such actions as stealing other wasps’ prey or laying in other wasp's nests). There are some species of solitary wasp that build communal nests, each insect having its own cell and providing food for its own offspring, but these wasps do not adopt the division of labour and the complex behavioural patterns adopted by eusocial species. [25]

Adult solitary wasps spend most of their time in preparing their nests and foraging for food for their young, mostly insects or spiders. Their nesting habits are more diverse than those of social wasps. Many species dig burrows in the ground. [25] Mud daubers and pollen wasps construct mud cells in sheltered places. [26] Potter wasps similarly build vase-like nests from mud, often with multiple cells, attached to the twigs of trees or against walls. [27]

Predatory wasp species normally subdue their prey by stinging it, and then either lay their eggs on it, leaving it in place, or carry it back to their nest where an egg may be laid on the prey item and the nest sealed, or several smaller prey items may be deposited to feed a single developing larva. Apart from providing food for their offspring, no further maternal care is given. Members of the family Chrysididae, the cuckoo wasps, are kleptoparasites and lay their eggs in the nests of unrelated host species. [25]



European hornet, Vespa crabro Vespa crabro09(js), Lodz(Poland).jpg
European hornet, Vespa crabro

Like all insects, wasps have a hard exoskeleton which protects their three main body parts, the head, the mesosoma (including the thorax and the first segment of the abdomen) and the metasoma. There is a narrow waist, the petiole, joining the first and second segments of the abdomen. The two pairs of membranous wings are held together by small hooks and the forewings are larger than the hind ones; in some species, the females have no wings. In females there is usually a rigid ovipositor which may be modified for injecting venom, piercing or sawing. [28] It either extends freely or can be retracted, and may be developed into a stinger for both defence and for paralysing prey. [29]

In addition to their large compound eyes, wasps have several simple eyes known as ocelli, which are typically arranged in a triangle just forward of the vertex of the head. Wasps possess mandibles adapted for biting and cutting, like those of many other insects, such as grasshoppers, but their other mouthparts are formed into a suctorial proboscis, which enables them to drink nectar. [30]

The larvae of wasps resemble maggots, and are adapted for life in a protected environment; this may be the body of a host organism or a cell in a nest, where the larva either eats the provisions left for it or, in social species, is fed by the adults. Such larvae have soft bodies with no limbs, and have a blind gut (presumably so that they do not foul their cell). [31]


Sand wasp Bembix oculata (Crabronidae) feeding on a fly after paralysing it with its sting Wasp August 2007-23.jpg
Sand wasp Bembix oculata (Crabronidae) feeding on a fly after paralysing it with its sting

Adult solitary wasps mainly feed on nectar, but the majority of their time is taken up by foraging for food for their carnivorous young, mostly insects or spiders. Apart from providing food for their larval offspring, no maternal care is given. [25] Some wasp species provide food for the young repeatedly during their development (progressive provisioning). [32] Others, such as potter wasps (Eumeninae) [33] and sand wasps ( Ammophila , Sphecidae), [34] repeatedly build nests which they stock with a supply of immobilised prey such as one large caterpillar, laying a single egg in or on its body, and then sealing up the entrance (mass provisioning). [35]

Predatory and parasitoidal wasps subdue their prey by stinging it. They hunt a wide variety of prey, mainly other insects (including other Hymenoptera), both larvae and adults. [25] The Pompilidae specialize in catching spiders to provision their nests. [36]

Spider wasp (Pompilidae) dragging a jumping spider (Salticidae) to provision a nest IndianSpiderWasp.JPG
Spider wasp (Pompilidae) dragging a jumping spider (Salticidae) to provision a nest

Some social wasps are omnivorous, feeding on fallen fruit, nectar, and carrion such as dead insects. Adult male wasps sometimes visit flowers to obtain nectar. Some wasps, such as Polistes fuscatus , commonly return to locations where they previously found prey to forage. [37] In many social species, the larvae exude copious amounts of salivary secretions that are avidly consumed by the adults. These include both sugars and amino acids, and may provide essential protein-building nutrients that are otherwise unavailable to the adults (who cannot digest proteins). [38]

Sex determination

In wasps, as in other Hymenoptera, sex is determined by a haplodiploid system, which means that females are unusually closely related to their sisters, enabling kin selection to favour the evolution of eusocial behaviour. Females are diploid, meaning that they have 2n chromosomes and develop from fertilized eggs. Males, called drones, have a haploid (n) number of chromosomes and develop from an unfertilized egg. [29] Wasps store sperm inside their body and control its release for each individual egg as it is laid; if a female wishes to produce a male egg, she simply lays the egg without fertilizing it. Therefore, under most conditions in most species, wasps have complete voluntary control over the sex of their offspring. [25] Experimental infection of Muscidifurax uniraptor with the bacterium Wolbachia induced thelytokous reproduction and an inability to produce fertile, viable male offspring. [39]

Inbreeding avoidance

Females of the solitary wasp parasitoid Venturia canescens can avoid mating with their brothers through kin recognition. [40] In experimental comparisons, the probability that a female will mate with an unrelated male was about twice as high as the chance of her mating with brothers. Female wasps appear to recognize siblings on the basis of a chemical signature carried or emitted by males. [40] Sibling-mating avoidance reduces inbreeding depression that is largely due to the expression of homozygous deleterious recessive mutations. [41]


As pollinators

While the vast majority of wasps play no role in pollination, a few species can effectively transport pollen and pollinate several plant species. [42] Since wasps generally do not have a fur-like covering of soft hairs and a special body part for pollen storage (pollen basket) as some bees do, pollen does not stick to them well. [43] However it has been shown that even without hairs, several wasp species are able to effectively transport pollen, therefore contributing for potential pollination of several plant species. [44]

Pollen wasps in the subfamily Masarinae gather nectar and pollen in a crop inside their bodies, rather than on body hairs like bees, and pollinate flowers of Penstemon and the water leaf family, Hydrophyllaceae. [45]

The Agaonidae (fig wasps) are the only pollinators of nearly 1000 species of figs, [43] and thus are crucial to the survival of their host plants. Since the wasps are equally dependent on their fig trees for survival, the coevolved relationship is fully mutualistic. [46]

As parasitoids

Most solitary wasps are parasitoids. [47] As adults, those that do feed typically only take nectar from flowers. Parasitoid wasps are extremely diverse in habits, many laying their eggs in inert stages of their host (egg or pupa), sometimes paralysing their prey by injecting it with venom through their ovipositor. They then insert one or more eggs into the host or deposit them upon the outside of the host. The host remains alive until the parasitoid larvae pupate or emerge as adults. [48]

The Ichneumonidae are specialized parasitoids, often of Lepidoptera larvae deeply buried in plant tissues, which may be woody. For this purpose, they have exceptionally long ovipositors; they detect their hosts by smell and vibration. Some of the largest species, including Rhyssa persuasoria and Megarhyssa macrurus , parasitise horntails, large sawflies whose adult females also have impressively long ovipositors. [49] Some parasitic species have a mutualistic relationship with a polydnavirus that weakens the host's immune system and replicates in the oviduct of the female wasp. [10]

One family of chalcid wasps, the Eucharitidae, has specialized as parasitoids of ants, most species hosted by one genus of ant. Eucharitids are among the few parasitoids that have been able to overcome ants' effective defences against parasitoids. [50] [51] [52]

As parasites

Many species of wasp, including especially the cuckoo or jewel wasps (Chrysididae), are kleptoparasites, laying their eggs in the nests of other wasp species to exploit their parental care. Most such species attack hosts that provide provisions for their immature stages (such as paralyzed prey items), and they either consume the provisions intended for the host larva, or wait for the host to develop and then consume it before it reaches adulthood. An example of a true brood parasite is the paper wasp Polistes sulcifer , which lays its eggs in the nests of other paper wasps (specifically Polistes dominula ), and whose larvae are then fed directly by the host. [53] [54] Sand wasps Ammophila often save time and energy by parasitising the nests of other females of their own species, either kleptoparasitically stealing prey, or as brood parasites, removing the other female's egg from the prey and laying their own in its place. [55] According to Emery's rule, social parasites, especially among insects, tend to parasitise species or genera to which they are closely related. [56] [57] For example, the social wasp Dolichovespula adulterina parasitises other members of its genus such as D. norwegica and D. arenaria . [58] [59]

As predators

Many wasp lineages, including those in the families Vespidae, Crabronidae, Sphecidae, and Pompilidae, attack and sting prey items that they use as food for their larvae; while Vespidae usually macerate their prey and feed the resulting bits directly to their brood, most predatory wasps paralyze their prey and lay eggs directly upon the bodies, and the wasp larvae consume them. Apart from collecting prey items to provision their young, many wasps are also opportunistic feeders, and will suck the body fluids of their prey. Although vespid mandibles are adapted for chewing and they appear to be feeding on the organism, they are often merely macerating it into submission. The impact of the predation of wasps on economic pests is difficult to establish. [60]

The roughly 140 species of beewolf (Philanthinae) hunt bees, including honeybees, to provision their nests; the adults feed on nectar and pollen. [61]

As models for mimics

With their powerful stings and conspicuous warning coloration, social wasps are the models for many species of mimic. Two common cases are Batesian mimicry, where the mimic is harmless and is essentially bluffing, and Müllerian mimicry, where the mimic is also distasteful, and the mimicry can be considered mutual. Batesian mimics of wasps include many species of hoverfly and the wasp beetle. Many species of wasp are involved in Müllerian mimicry, as are many species of bee. [62]

As prey

While wasp stings deter many potential predators, bee-eaters (in the bird family Meropidae) specialise in eating stinging insects, making aerial sallies from a perch to catch them, and removing the venom from the stinger by repeatedly brushing the prey firmly against a hard object, such as a twig. [63] The honey buzzard attacks the nests of social hymenopterans, eating wasp larvae; it is the only known predator of the dangerous [64] Asian giant hornet or "yak-killer" ( Vespa mandarinia ). [65] Likewise, Roadrunners are the only real predators of tarantula hawk wasps. [66]

Relationship with humans

As pests

Social wasps are considered pests when they become excessively common, or nest close to buildings. People are most often stung in late summer, when wasp colonies stop breeding new workers; the existing workers search for sugary foods and are more likely to come into contact with humans; if people then respond aggressively, the wasps sting. [67] Wasp nests made in or near houses, such as in roof spaces, can present a danger as the wasps may sting if people come close to them. [68] Stings are usually painful rather than dangerous, but in rare cases, people may suffer life-threatening anaphylactic shock. [69]

In horticulture

Some species of parasitic wasp, especially in the Trichogrammatidae, are exploited commercially to provide biological control of insect pests. [2] [70] For example, in Brazil, farmers control sugarcane borers with the parasitic wasp Trichogramma galloi . [71] One of the first species to be used was Encarsia formosa , a parasitoid of a range of species of whitefly. It entered commercial use in the 1920s in Europe, was overtaken by chemical pesticides in the 1940s, and again received interest from the 1970s. Encarsia is used especially in greenhouses to control whitefly pests of tomato and cucumber, and to a lesser extent of aubergine (eggplant), flowers such as marigold, and strawberry. [72] Several species of parasitic wasp are natural predators of aphids and can help to control them. [73] For instance, Aphidius matricariae is used to control the peach-potato aphid. [74]

In sport

Wasps RFC is an English professional rugby union team originally based in London but now playing in Coventry; the name dates from 1867 at a time when names of insects were fashionable for clubs. The club's first kit is black with yellow stripes. [75] The club has an amateur side called Wasps FC. [76]

Among the other clubs bearing the name are a basketball club in Wantirna, Australia, [77] and Alloa Athletic F.C., a football club in Scotland. [78]

In fashion

Wasp waist, c. 1900, demonstrated by Polaire, a French actress famous for this silhouette Polaire, French actress 5.jpg
Wasp waist, c. 1900, demonstrated by Polaire, a French actress famous for this silhouette

Wasps have been modelled in jewellery since at least the nineteenth century, when diamond and emerald wasp brooches were made in gold and silver settings. [79] A fashion for wasp waisted female silhouettes with sharply cinched waistlines emphasizing the wearer's hips and bust arose repeatedly in the nineteenth and twentieth centuries. [80] [81]

In literature

The Ancient Greek playwright Aristophanes wrote the comedy play Σφῆκες (Sphēkes), The Wasps , first put on in 422 BC. The "wasps" are the chorus of old jurors. [82]

H. G. Wells made use of giant wasps in his novel The Food of the Gods and How It Came to Earth (1904): [83]

It flew, he is convinced, within a yard of him, struck the ground, rose again, came down again perhaps thirty yards away, and rolled over with its body wriggling and its sting stabbing out and back in its last agony. He emptied both barrels into it before he ventured to go near. When he came to measure the thing, he found it was twenty-seven and a half inches across its open wings, and its sting was three inches long. ... The day after, a cyclist riding, feet up, down the hill between Sevenoaks and Tonbridge, very narrowly missed running over a second of these giants that was crawling across the roadway. [83]

Detail of Botticelli's Venus and Mars, 1485, with a wasp's nest on right, probably a symbol of the Vespucci family who commissioned the painting. Botticelli-Venus and Mars (cropped).jpg
Detail of Botticelli's Venus and Mars, 1485, with a wasp's nest on right, probably a symbol of the Vespucci family who commissioned the painting.

Wasp (1957) is a science fiction book by the English writer Eric Frank Russell; it is generally considered Russell's best novel. [85] In Stieg Larsson's book The Girl Who Played with Fire (2006) and its film adaptation, Lisbeth Salander has adopted her kickboxing ringname, "The Wasp", as her hacker handle and has a wasp tattoo on her neck, indicating her high status among hackers, unlike her real world situation, and that like a small but painfully stinging wasp, she could be dangerous. [86]

Parasitoidal wasps played an indirect role in the nineteenth-century evolution debate. The Ichneumonidae contributed to Charles Darwin's doubts about the nature and existence of a well-meaning and all-powerful Creator. In an 1860 letter to the American naturalist Asa Gray, Darwin wrote:

I own that I cannot see as plainly as others do, and as I should wish to do, evidence of design and beneficence on all sides of us. There seems to me too much misery in the world. I cannot persuade myself that a beneficent and omnipotent God would have designedly created the Ichneumonidae with the express intention of their feeding within the living bodies of caterpillars, or that a cat should play with mice. [87]

In military names

HMS Wasp (1880), one of nine Royal Navy warships to bear the name HMS Wasp (1880).jpg
HMS Wasp (1880), one of nine Royal Navy warships to bear the name

With its powerful sting and familiar appearance, the wasp has given its name to many ships, aircraft and military vehicles. [88] Nine ships and one shore establishment of the Royal Navy have been named HMS Wasp, the first an 8-gun sloop launched in 1749. [89] Eleven ships of the United States Navy have similarly borne the name USS Wasp, the first a merchant schooner acquired by the Continental Navy in 1775. [90] The eighth of these, an aircraft carrier, gained two Second World War battle stars, prompting Winston Churchill to remark "Who said a Wasp couldn't sting twice?" [88] In the Second World War, a German self-propelled howitzer was named Wespe, [91] while the British developed the Wasp flamethrower from the Bren Gun Carrier. [92] In aerospace, the Westland Wasp was a military helicopter developed in England in 1958 and used by the Royal Navy and other navies. [93] The AeroVironment Wasp III is a miniature UAV developed for United States Air Force special operations. [94]

See also


  1. Methods to estimate species diversity include extrapolating the rate of species descriptions by subfamily (as in the Braconidae) until zero is reached; and extrapolating geographically from the species distribution of well-studied taxa to the group of interest (say, the Braconidae). Dolphin et al found a correlation between the predicted numbers of undescribed species by these two methods, doubling or tripling the number of species in the group. [9]
  2. Specimen measured from photograph.

Related Research Articles

Hymenoptera Order of insects

Hymenoptera is a large order of insects, comprising the sawflies, wasps, bees, and ants. Over 150,000 living species of Hymenoptera have been described, in addition to over 2,000 extinct ones.

Vespidae Family of insects

The Vespidae are a large, diverse, cosmopolitan family of wasps, including nearly all the known eusocial wasps and many solitary wasps. Each social wasp colony includes a queen and a number of female workers with varying degrees of sterility relative to the queen. In temperate social species, colonies usually only last one year, dying at the onset of winter. New queens and males (drones) are produced towards the end of the summer, and after mating, the queens hibernate over winter in cracks or other sheltered locations. The nests of most species are constructed out of mud, but polistines and vespines use plant fibers, chewed to form a sort of paper. Many species are pollen vectors contributing to the pollination of several plants, being potential or even effective pollinators, while others are notable predators of pest insect species.

Apocrita suborder of insects

The Apocrita are a suborder of insects in the order Hymenoptera. It includes wasps, bees, and ants, and consists of many families. It contains the most advanced hymenopterans and is distinguished from Symphyta by the narrow "waist" (petiole) formed between the first two segments of the actual abdomen; the first abdominal segment is fused to the thorax, and is called the propodeum. Therefore, it is general practice, when discussing the body of an apocritan in a technical sense, to refer to the mesosoma and metasoma rather than the "thorax" and "abdomen", respectively. The evolution of a constricted waist was an important adaption for the parasitoid lifestyle of the ancestral apocritan, allowing more maneuverability of the female's ovipositor. The ovipositor either extends freely or is retracted, and may be developed into a stinger for both defense and paralyzing prey. Larvae are legless and blind, and either feed inside a host or in a nest cell provisioned by their mothers.

Ichneumonoidea superfamily of insects

The superfamily Ichneumonoidea contains one extinct and three extant families, including the two largest families within Hymenoptera: Ichneumonidae and Braconidae. The group is thought to contain as many as 100,000 species, many of which have not yet been described. Like other parasitoid wasps, they were long placed in the "Parasitica", variously considered as an infraorder or an unranked clade, now known to be paraphyletic.

<i>Polistes</i> genus of insects

Wasps of the cosmopolitan genus Polistes are the most familiar of the polistine wasps, and are the most common type of paper wasp in North America. Walter Ebeling coined the vernacular name "umbrella wasps" for this genus in 1975 to distinguish it from other types of paper wasp, in reference to the form of their nests. It is also the single largest genus within the family Vespidae, with over 300 recognized species and subspecies. Their innate preferences for nest-building sites leads them to commonly build nests on human habitation, where they can be very unwelcome; although generally not aggressive, they can be provoked into defending their nests. All species are predatory, and they may consume large numbers of caterpillars, in which respect they are generally considered beneficial. The European paper wasp, Polistes dominula, was introduced into the US about 1981 and has quickly spread throughout most of the country, in most cases replacing native species within a few years. This species is very commonly mistaken for a yellow jacket, as it is black, strongly marked with yellow, and quite different from the native North American species of Polistes. The cuckoo wasp, Polistes sulcifer, is an obligate social parasite, whose only host is P. dominula. Polistes annularis, whose species name is Latin for "ringed", is also known for its distinctive red body color. Polistes metricus adults malaxate their insect prey by chewing them into a pulp, sucking out and ingesting the body fluids, then feeding the rest of the morsel to their larvae. The most widely distributed South American wasp species, Polistes versicolor, is particularly common in the southeastern Brazilian states. This social wasp is commonly referred to as the yellow paper wasp due to the distinct yellow bands found on its thorax and abdomen. Polistes wasps can be identified by their characteristic flight; their long legs dangle below their bodies, which are also more slender than a yellow jacket.

Parasitoid wasp evolutionary grade of hymenopteran superfamilies

Parasitoid wasps are a large group of hymenopteran superfamilies, with all but the wood wasps (Orussoidea) being in the wasp-waisted Apocrita. As parasitoids, they lay their eggs on or in the bodies of other arthropods, sooner or later causing the death of these hosts. Different species specialise in hosts from different insect orders, most often Lepidoptera, though some select beetles, flies, or bugs; the spider wasps (Pompilidae) exclusively attack spiders.

European paper wasp species of insect

The European paper wasp is one of the most common and well-known species of social wasps in the genus Polistes. Its diet is more diverse than that of most Polistes species—many genera of insects versus mainly caterpillars in other Polistes—giving it superior survival ability compared to other wasp species during a shortage of resources.

<i>Polistes gallicus</i> species of wasp

Polistes gallicus is a fairly common species of paper wasp found in various parts of Europe, excluding England, Denmark, and Scandinavia, from warmer climates to cooler regions north of the Alps. The distribution of P. gallicus also extends into northern regions of Africa, Israel, Iran, and even parts of China and Russia. Nests of these social insects are created in these various conditions. The Polistes species uses an oral secretion to construct their nests, which consist of a combination of saliva and chewed plant fibers. This structural mixture physically protects the nest from various harsh elements and from weathering over time.

Mass provisioning a form of parental investment

Mass provisioning is a form of parental investment in which an adult insect, most commonly a hymenopteran such as a bee or wasp, stocks all the food for each of her offspring in a small chamber before she lays the egg. This behavior is common in both solitary and eusocial bees, though essentially absent in eusocial wasps.

<i>Polistes chinensis</i> species of insect

Polistes chinensis is a polistine vespid wasp in the cosmopolitan genus Polistes, and is commonly known as the Asian, Chinese or Japanese paper wasp. It is found in East Asia, in particular China and Japan. The subspecies P. chinensis antennalis is an invasive species in New Zealand, having arrived in 1979.

<i>Polistes annularis</i> species of insect

Polistes annularis is a species of paper wasp which lives throughout the Caribbean and in parts of North America. Its species name is Latin for "ringed" and it is known for its distinct red body color. It builds its nest under overhangs near bodies of water that minimize the amount of sunlight penetration. It clusters its nests together in large aggregations, and consumes nectar and other insects. Its principal predator is the ant, although birds are also known to prey on it. It is a primitively eusocial wasp, meaning that all individuals have the capacity for reproduction, regardless of social caste. This primitive eusociality has been seen in bees as well, including sweat bees such as Lasioglossum zephyrus. As such, P. annularis demonstrates behavior typical of other polistine wasps, and has a dominance hierarchy, relatively small colony size, and a female-biased sex ratio. Unlike other wasps, P. annularis is relatively robust in winter conditions, and has also been observed to store honey in advance of hibernation. It is closely related to P. major, P. buysonni, and others in the subgenus Aphanilopterus, and slightly less related to the more common P. bellicosus, P. carolina, P. metricus, and P. fuscatus.

<i>Polistes metricus</i> Species of wasp

Polistes metricus is a wasp native to North America. In the United States, it ranges throughout the southern Midwest, the South, and as far northeast as New York, but has recently been spotted in southwest Ontario. A single female specimen has also been reported from Dryden, Maine. Polistes metricus is dark colored, with yellow tarsi and black tibia. Nests of Polistes metricus can be found attached to the sides of buildings, trees, and shrubbery.

<i>Polistes fuscatus</i> species of insect

Polistes fuscatus, whose common name is the golden or northern paper wasp, is widely found throughout southern Canada, the United States, and Central America. It often nests around human development. However, it greatly prefers areas in which wood is readily available for use as nest material, therefore they are also found near and in woodlands and savannas. P. fuscatus is a social wasp that is part of a complex society based around a single dominant queen along with other cofoundresses and a dominance hierarchy.

Hunting wasp

Hunting wasps are members of various taxa of the insect order Hymenoptera. Their habits and affinities vary in many ways, but all practise parental care of their larvae in that they capture prey, usually insects, to feed their larvae. Whether solitary or social, most species construct some form of protection or nest in which they hide the prey and in which the larvae can feed and pupate in reasonable security.

<i>Polistes exclamans</i> species of insect

Polistes exclamans is a social wasp and is part of the family Vespidae of the order Hymenoptera. It is found throughout the United States, Mexico, the Bahamas, Jamaica and parts of Canada. Due to solitary nest founding by queens, P. exclamans has extended its range in the past few decades and now covers the eastern half of the United States, as well as part of the north. This expansion is typically attributed to changing global climate and temperatures. P. exclamans has three specific castes, including males, workers, and queens, but the dominance hierarchy is further distinguished by age. The older the wasp is, the higher it is in ranking within the colony. In most P. exclamans nests, there is one queen who lays all the eggs in the colony. The physiological similarities between the worker and queen castes have led to experiments attempting to distinguish the characteristics of these two castes and how they are determined, though males have easily identifiable physiological characteristics. Since P. exclamans live in relatively small, open combed nests, they are often subject to predators and parasites, such as Chalcoela iphitalis, Elasmus polistis, and birds. P. exclamans have defense and recognition strategies that help protect against these predators and parasites.

Dufours gland

Dufour's gland is an abdominal gland of certain insects, part of the anatomy of the ovipositor or sting apparatus in female members of Apocrita. The diversification of Hymenoptera took place in the Cretaceous and the gland may have developed at about this time as it is present in all three groups of Apocrita, the wasps, bees and ants.

<i>Mischocyttarus flavitarsis</i> species of insect

Mischocyttarus flavitarsis is a social paper wasp found in western North America. Their nests can be found both in forests close to rivers or in close proximity to human life under the eaves of roofs. Despite the fact that M. flavitarsis nests are frequently in close contact with humans, M. flavitarsis typically will not sting, but rather ram into the threatening individual. Their colony cycle typically begins before May and will last until October. The queen will then seek a hibernation site for the winter. Perched near female hibernation sites are males with whom the female will mate. The males have claimed their territory by rubbing sternal brushes along the border of the site, leaving a chemical that deters other individuals from approaching. M. flavitarsis feed on arthropods, nectar, and animal carcasses and are often prey to birds, ants, and praying mantis.

<i>Polistes versicolor</i> species of insect

Polistes versicolor is a subtropical social wasp within Polistes, the most common genus of paper wasp. The most widely distributed South American wasp species, P. versicolor is particularly common in the Southeastern Brazilian states. This social wasp is commonly referred to as the yellow paper wasp due to the distinct yellow bands found on its thorax and abdomen. The P. versicolor nest, made of chewed vegetable fiber, is typically a single, uncovered comb attached to the substratum by a single petiole. The yellow wasp is frequently found in urban areas. New nests and colonies are usually founded by an association of females, sometimes in human buildings. The P. versicolor colony cycle broadly ranges from 3 to 10 months, although there appears to be no relationship between the colony's development and the season of the year. While yellow paper wasps do have clear annual colony cycles, many young queens have the opportunity to hibernate during the winter, forming optional winter aggregations. Dominance hierarchies within these aggregations are characterized by physical aggression of the dominant female(s) towards the associated females, who tend to be sisters. Wagging movements are also often used as a form of communication within the colony. The yellow paper wasp is generally predatory, capturing a wide range of insects, although it often feeds on pollen and nectar as well. Therefore, P. versicolor can be useful as a pollinator or as effective pest control.

<i>Chrysis ignita</i> species of insect

Chrysis ignita, also known as the ruby-tailed wasp, is a species of cuckoo wasps. Cuckoo wasps are kleptoparasites – they lay their eggs in the nests of other wasp species and their young consume the eggs or larva of the host wasp for sustenance. These wasps have a number of adaptions which have evolved to equip them for their life cycle. Chrysis ignita parasitize mason bees in particular. Ruby-tailed wasps have metallic, armored bodies, and can roll up into balls to protect themselves from harm when infiltrating the nests of host bees and wasps. Unlike most other Hymenopterans, cuckoo wasps cannot sting. Chrysis ignita is found across the European continent.

Protopolybia chartergoides, also known as Pseudochartergus chartergoides, is a species of wasp within the genus Protopolybia. It is a social wasp found in southern Central America and northern South America.


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