The Lygaeidae are a family in the Hemiptera, with more than 110 genera in 4 subfamilies. The family includes the insects commonly known as milkweed bugs, and also some of those known as seed bugs. The family used to be vastly larger, as numerous former subfamilies have been removed and given independent family status, including Artheneidae, Blissidae, Cryptorhamphidae, Cymidae, Geocoridae, Heterogastridae, Ninidae, Oxycarenidae, Pachygronthidae, and Rhyparochromidae, which together constituted well over half of the former family. Many of the species feed on seeds, although some feed on sap (mucivory), and a few, such as the wekiu bug, feed on insects.
The Rhyparochromidae are a large family of true bugs, many of which are commonly referred to as seed bugs. The family includes two subfamilies, more than 420 genera, and over 2,100 described species.
Clastopteridae is a family of spittlebugs in the order Hemiptera. There are at least 10 genera and 100 described species in Clastopteridae.
Rhyparochrominae is a subfamily of dirt-colored seed bugs in the family Rhyparochromidae. There are more than 410 genera and 2,000 described species in Rhyparochrominae.
Oxycarenidae is a family of true bugs in the order Hemiptera. There are more than 20 genera and 140 described species in Oxycarenidae.
Achilidae is a family of achilid planthoppers in the order Hemiptera. There are at least 160 genera and 520 described species in Achilidae.
Mesoveliidae is a family of water treaders in the order Hemiptera. There are about 16 genera and at least 50 described species in Mesoveliidae.
Cymidae is a family of true bugs in the order Hemiptera. There are about 12 genera and at least 60 described species in Cymidae.
Geocoridae is a family of big-eyed bugs in the order Hemiptera. There are more than 30 genera and 290 described species in Geocoridae.
Metacanthinae is a subfamily of stilt bugs in the family Berytidae. There are about 12 genera and 80 described species in Metacanthinae.
Artheneidae is a family of true bugs in the order Hemiptera. It was formerly included in Lygaeidae. There are about 7 genera and at least 20 described species in Artheneidae.
Pachygronthidae is a family of true bugs in the order Hemiptera. There are about 14 genera and more than 80 described species in Pachygronthidae.
Macroveliidae is a family of macroveliid shore bugs in the order Hemiptera. There are at least four genera in Macroveliidae.
Thaumastocoridae is a family of true bugs in the order Hemiptera. There are about 9 genera and more than 20 described species in the family Thaumastocoridae.
Ninidae is a family of true bugs in the order Hemiptera. There are about 5 genera and 14 described species in Ninidae.
Leptopodidae is a family of spiny-legged bugs in the order Hemiptera. There are about 15 genera and more than 40 described species in Leptopodidae.
Colobathristidae is a family of true bugs in the order Hemiptera. There are more than 20 genera and 90 described species in Colobathristidae.
Cryptorhamphidae is a family of true bugs in the order Hemiptera. There are at least two genera and four described species in Cryptorhamphidae.
Malcidae is a family of true bugs in the order Hemiptera. There are at least 3 genera and more than 40 described species in Malcidae.
Ischnorhynchinae is a subfamily of seed bugs in the family Lygaeidae. There are about 16 genera and more than 70 described species in Ischnorhynchinae.
