This article contains a list of Hymenoptera Apocrita of Ireland.
Cryptocheilus is a genus of spider wasps of the subfamily Pepsinae, they are found in the world's warmer regions. They vary in size from medium to large and are often strikingly coloured. The females construct multicellular nests in cavities, once built each cell is stocked with a spider, captured by the female. They are found in open habitats such as heaths, meadows and forest edges.
Crossocerus is a genus of square-headed wasps in the family Crabronidae. There are at least 250 described species in Crossocerus.
Ectemnius is a genus of wasps in the family Crabronidae. 188 species are known. The genus is found around the world but Australia has only two species.
Sphecodes is a genus of bees from the family Halictidae, the majority of which are black and red in colour and are colloquially known as blood bees. Sphecodes bees are kleptoparasitic on other bees, especially bees in the genera Lasioglossum, Halictus and Andrena. The adults consume nectar, but because they use other bees' provisions to feed their offspring they do not collect pollen.
A list of the species of Hymenoptera from New Zealand; currently listing the 'stinging wasps' (Aculeata), which includes ants, bees, and social wasps.