Eye-gnat
Guides
Chloropidae
frit flies, grass flies, eye gnats
Chloropidae are a large family of small flies comprising approximately 2000 described species in over 160 genera, distributed worldwide. Adults are minute to small (1.0–4.0 mm, rarely to 12 mm), typically yellow, black, gray, or greenish, with a shiny appearance due to sparse pubescence. The mesonotum often bears three to five dark longitudinal stripes. Larvae exhibit diverse life histories: most are phytophagous, feeding on grasses and cereal crops, with some species causing significant agricultural damage; others are saprophagous, predatory, parasitic, or kleptoparasitic. A few species in genera Hippelates and Siphunculina are attracted to lachrymal secretions and other body fluids of mammals, earning the name 'eye gnats' and serving as mechanical vectors of bacterial and viral pathogens.
Hippelates dorsalis
Hippelates dorsalis is a small fly in the family Chloropidae (grass flies or frit flies), described by Loew in 1869. Members of the genus Hippelates are commonly known as eye gnats due to their habit of hovering around the eyes and other moist facial areas of humans and animals. The specific epithet 'dorsalis' refers to a dorsal (back) characteristic, though the precise morphological feature referenced is not detailed in available sources. Like other chloropids, this species likely has a compact body and reduced wing venation typical of the family.
Hippelates nobilis
Hippelates nobilis is a species of frit fly in the family Chloropidae, first described by Loew in 1863. The species has been documented in Florida with a newly recorded host plant association, though the specific host plant identity was not detailed in available source material. As a member of the Hippelates genus, it belongs to a group of small flies commonly known as eye gnats or frit flies, though species-specific biological details for H. nobilis remain limited in published literature.
Liohippelates
Liohippelates Eye Gnats, eye gnats
Liohippelates is a genus of eye gnats (Diptera: Chloropidae) containing approximately 11 described species. These small flies are recognized for their persistent association with mammalian eyes and bodily secretions, causing significant nuisance to humans and livestock. Several species, notably L. pusio and L. collusor, have been extensively studied as agricultural and public health pests in the United States since the 1930s. The genus includes confirmed mechanical vectors of human pathogens, with L. peruanus documented carrying Haemophilus aegyptius associated with Brazilian purpuric fever.
Liohippelates collusor
eye gnat
Liohippelates collusor is a species of eye gnat in the family Chloropidae, recognized as a significant pest of humans and animals in the United States since the 1930s. Along with Liohippelates pusio, it has been the focus of extensive research on biology, ecology, and management. The species causes considerable discomfort and stress through persistent attraction to eyes, wounds, and body openings, and may transmit pathogens. Its biology and life cycle have been well studied in agricultural systems, though its ecological roles in natural ecosystems remain poorly documented.