gnat, common name for any one of a number of small, fragile-looking two-winged flies of the suborder Nematocera, order Diptera, which includes the families Tipulidae (crane flies crane fly, true fly resembling a mosquito, often called daddy longlegs because of its six long, delicate legs. (The harvestman , also called daddy longlegs, belongs to an unrelated order.) Most species of crane flies have a single pair of wings and slender bodies.
..... Click the link for more information. ), Bibionidae (hairflies), Ceratopogonidae (biting midges midge, name for any of numerous minute, fragile flies in several families. The family Chironomidae consists of about 2,000 species, most of which are widely distributed. The herbivorous larvae are found in all freshwaters; the larvae of some species live in saltwater.
..... Click the link for more information. ), Chironomidae (true midges), Cecidomyidae (gall midges), Simuliidae (black flies black fly, name for any of the flies of the family Simuliidae. The black fly is about 1-8 in. (3.2 mm) long and has large eyes, short legs, a stout, humped back, broad gauzy wings, and piercing-sucking mouthparts.
..... Click the link for more information. ), Culicidae (mosquitoes mosquito (məskē`tō), small, long-legged insect of the order Diptera, the true flies .
..... Click the link for more information. ), and others. They often assemble together in large mating swarms. In England mosquitoes are called gnats; in the United States it is chiefly the smaller forms of Diptera, especially irritating because of their great numbers and their vicious biting habits, that are referred to as gnats. All gnats have long, hairlike antennae, which are particularly well-developed in the males. Gnat larvae are free-living, most feeding on plants. Larval plant feeders, e.g., the Hessian fly Hessian fly, European gall gnat , Phytophaga destructor, so named because it was first observed in America shortly after the Hessian troops landed on Long Island in the American Revolution. It is one of the most destructive pests of wheat, barley, and rye.
..... Click the link for more information. larvae, cause root, stem, and leaf galls to be formed by the host plant. Some species of fungus gnats (families Mycetophilidae and Sciaridae) are very common pests of mushrooms and roots of potted plants in homes and greenhouses. One group of dipterans (family Chloropidae) of the suborder Cyclorrhapha are commonly called eye gnats, or eye flies eye fly, common name for a group of small flies of the family Chloropidae. Eye flies are common in parts of California and in the S United States. They inhabit grasslands and meadows and breed mainly on decaying matter and excrement.
..... Click the link for more information. . Gnats are classified in the phylum Arthropoda Arthropoda (ärthrŏp`ədə) [Gr.,=jointed feet], largest and most diverse animal phylum.
..... Click the link for more information. , class Insecta, order Diptera.

gnat

Any member of several species of small dipterans, most of which bite or annoy humans. Midges are also sometimes called gnats. In North America the name is also applied to the blackfly, fruit fly, and other small flies that hover about the eyes of humans and other animals.

gnat

any of various small fragile biting dipterous insects of the suborder Nematocera, esp Culex pipiens (common gnat), which abounds near stagnant water

gnat [nat]

(invertebrate zoology)

The common name for a large variety of biting insects in the order Diptera.

gnat

chicken-sized insect that tells Alice all about other strange insects. [Br. Lit.: Lewis Carroll Through the Looking-glass]

See : Insect

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