Asilidae
Guides
Eucyrtopogon maculosus
Eucyrtopogon nigripes
Eucyrtopogon nigripes is a species of robber fly (family Asilidae) described by Jones in 1907. The specific epithet "nigripes" (Latin for "black-footed") suggests a distinctive dark coloration of the legs. Robber flies in the genus Eucyrtopogon are generally small to medium-sized predatory flies. This species belongs to a diverse family of aerial predators known for their hunting behavior.
Eucyrtopogon spiniger
Eucyrtopogon spiniger is a species of robber fly in the family Asilidae, described by Curran in 1923. It belongs to a genus of small, slender robber flies found in North America. Members of this genus are predatory as adults, capturing other insects in flight. The specific epithet 'spiniger' refers to spine-bearing characteristics, likely describing some aspect of the morphology.
Eudioctria
Eudioctria is a genus of small robber flies in the family Asilidae, established by Wilcox & Martin in 1941. The genus comprises approximately 14 described species, making it one of the more species-rich genera within the subfamily Stenopogoninae. Species in this genus are among the smallest North American robber flies, measuring only 6–8 mm in length. The genus is primarily distributed in western North America, though four species extend into eastern states.
Eudioctria albius
Eudioctria albius is a small robber fly species in the family Asilidae, measuring approximately 6–8 mm in length. It is one of four Eudioctria species occurring in eastern North America, with the genus being primarily western in distribution. The species belongs to the subfamily Stenopogoninae and is among the tiniest North American robber flies.
Eudioctria beameri
Eudioctria beameri is a small robber fly in the family Asilidae, subfamily Stenopogoninae. It belongs to a genus containing some of the smallest North American robber flies, with body lengths of only 6–8 mm. The species is primarily western in distribution, though some Eudioctria species extend into eastern North America. Like other robber flies, it is an active aerial predator that captures prey in flight.
Eudioctria denuda
Eudioctria denuda is a species of robber fly in the family Asilidae, subfamily Stenopogoninae. It belongs to a genus of small, compact robber flies measuring only 6–8 mm in length. The genus Eudioctria is primarily western in distribution, with only four of its fourteen species occurring in eastern North America. Species identification within the genus requires examination of facial gibbosities and assessment of pollinosity on body parts.
Eudioctria dissimilis
Eudioctria dissimilis is a species of robber fly in the subfamily Stenopogoninae, described by Adisoemarto and Wood in 1975. The genus Eudioctria comprises some of the smallest North American robber flies, with body lengths of 6–8 mm. Species in this genus are primarily western in distribution, though E. dissimilis is one of four eastern species.
Eudioctria doanei
Eudioctria doanei is a small robber fly (family Asilidae) in the subfamily Stenopogoninae. It belongs to a genus of diminutive predatory flies measuring only 6–8 mm in length, making them among the smallest North American robber flies. The species was described by Melander in 1924. While specific details about this particular species are sparse, the genus Eudioctria is primarily western in distribution, with four of its fourteen species extending into eastern North America. Members of this genus are known to perch on flat leaves at the tops of small shrubs, distinguishing them behaviorally from similar-looking Cerotainia species that prefer twig-ends.
Eudioctria monrovia
Eudioctria monrovia is a species of robber fly (family Asilidae, subfamily Stenopogoninae) described by Wilcox and Martin in 1941. The genus Eudioctria comprises some of the smallest North American robber flies, with adults measuring only 6–8 mm in length. Species in this genus are primarily western in distribution, though a few species extend into eastern North America. Like other robber flies, members of this genus are predatory as adults.
Eudioctria nitida
Eudioctria nitida is a species of robber fly in the family Asilidae, subfamily Stenopogoninae. It is one of the smallest North American robber flies, measuring approximately 6–8 mm in length. The genus Eudioctria contains 14 species, with most distributed in the western United States; four species (including E. nitida) extend into eastern North America. Species identification within the genus requires examination of facial gibbosities and pollinosity patterns.
Eudioctria propinqua
Eudioctria propinqua is a species of robber fly in the family Asilidae, subfamily Stenopogoninae. It is among the smallest North American robber flies, measuring approximately 6–8 mm in length. The species occurs in eastern North America and is one of four Eudioctria species found in the eastern United States.
Eudioctria sackeni
Eudioctria sackeni is a species of robber fly in the family Asilidae, subfamily Stenopogoninae. The genus Eudioctria comprises among the smallest North American robber flies, measuring only 6–8 mm in length. Species in this genus superficially resemble Cerotainia (subfamily Laphriinae) but lack the extra-long antennae. Eudioctria is primarily a western U.S. genus, though four of its 14 species occur in eastern states.
Eudioctria unica
Eudioctria unica is a species of robber fly in the family Asilidae, described by Adisoemarto and Wood in 1975. It belongs to the subfamily Stenopogoninae and is among the smallest North American robber flies, measuring only 6–8 mm in length. The genus Eudioctria is primarily western in distribution, with only four species extending into eastern North America.
Hadrokolos
Hadrokolos is a genus of robber flies (Asilidae) established by Martin in 1959. The genus contains at least four described species distributed in North America. As members of the Asilidae family, species in this genus are predatory flies. The genus is relatively small and understudied compared to larger asilid genera.
Hadrokolos cazieri
Hadrokolos cazieri is a species of robber fly in the family Asilidae, first described by Martin in 1959. The genus Hadrokolos is a small group within the diverse asilid fauna of North America. Robber flies in this genus are predatory insects that capture other arthropods in flight. Specific ecological details for H. cazieri remain poorly documented in published literature.
Hadrokolos texanus
Hadrokolos texanus is a species of robber fly in the family Asilidae, first described by Bromley in 1934. The genus Hadrokolos is a relatively small group within the diverse robber fly family. Like other Asilidae, this species is presumably predatory as both adults and larvae, though specific details of its biology remain poorly documented. The specific epithet 'texanus' indicates a type locality or primary association with Texas.
Haplopogon
Haplopogon is a genus of robber flies in the family Asilidae, established by Engel in 1930. As members of the Asilidae, these are predatory flies characterized by their robust build and predatory habits. The genus is poorly documented in modern literature, with limited species-level information available.
Haplopogon bullatus
Haplopogon bullatus is a species of robber fly in the family Asilidae, described by Bromley in 1934. The genus Haplopogon belongs to the subfamily Stenopogoninae, a group of predatory flies characterized by their elongated bodies and strong predatory habits. Like other asilids, this species is presumed to be an active aerial predator of other insects.
Haplopogon erinus
Haplopogon erinus is a species of robber fly described by Pritchard in 1941. It belongs to the genus Haplopogon, a group within the Asilidae family characterized by reduced wing venation and distinctive predatory habits. The species is known from limited collection records and remains poorly documented in the scientific literature.
Haplopogon triangulatus
Haplopogon triangulatus is a species of robber fly (family Asilidae) described by Martin in 1955. As a member of this predatory fly family, it likely shares the characteristic hunting behavior of ambushing and capturing other insects in flight. The species epithet 'triangulatus' suggests a triangular feature in its morphology, possibly in wing venation or body shape. No iNaturalist observations are recorded for this species, indicating it may be rare, poorly known, or restricted in distribution.
Haplopogon utahensis
Haplopogon utahensis is a species of robber fly (family Asilidae) described by Wilcox in 1966. As a member of the diverse Asilidae family, it is a predatory dipteran. The specific epithet 'utahensis' indicates a connection to Utah, likely reflecting the type locality or known distribution. Robber flies in this genus are typically aerial predators that capture other insects in flight.
Heteropogon arizonensis
Heteropogon arizonensis is a species of robber fly in the family Asilidae, described by Wilcox in 1941. The genus Heteropogon belongs to the subfamily Brachyrhopalinae, a group of small to medium-sized predatory flies. Members of this genus are known for their characteristic perching behavior on twigs and vegetation while hunting flying insect prey. The specific epithet "arizonensis" indicates the species was described from Arizona, though detailed natural history information for this particular species remains limited.
Heteropogon cazieri
Heteropogon cazieri is a species of robber fly (family Asilidae) described by Wilcox in 1965. It belongs to the subfamily Brachyrhopalinae and is one of approximately 30 described species in the genus Heteropogon. Members of this genus are small to medium-sized predatory flies that perch on vegetation and capture other insects in flight. The species epithet honors entomologist Mont A. Cazier.
Heteropogon chiricahua
A species of robber fly in the family Asilidae, described by Wilcox in 1965. The specific epithet "chiricahua" refers to the Chiricahua Mountains of southeastern Arizona, suggesting a geographic association with this Sky Island region. As with other members of the genus Heteropogon, this species is presumed to be a predatory fly, though specific observations of its behavior and ecology remain undocumented in available sources.
Heteropogon cirrhatus
Heteropogon cirrhatus is a species of robber fly in the family Asilidae, first described by Osten Sacken in 1877. Robber flies in this genus are small to medium-sized predatory insects. The genus Heteropogon is part of the subfamily Brachyrhopalinae. Available information about this specific species is limited.
Heteropogon currani
Heteropogon currani is a robber fly species in the family Asilidae, described by Pritchard in 1935. As a member of the genus Heteropogon, it shares the characteristic predatory habits and distinctive courtship behaviors documented in congeners. The species is part of the subfamily Brachyrhopalinae, a group of generally small to medium-sized asilids. Like other robber flies, adults are predatory on other insects.
Heteropogon divisus
Heteropogon divisus is a species of robber fly in the family Asilidae, subfamily Brachyrhopalinae. The genus Heteropogon comprises small to medium-sized robber flies with distinctive courtship behaviors. Adults are predatory, capturing other insects in flight and feeding on them using piercing-sucking mouthparts. The species was described by Coquillett in 1902.
Heteropogon duncani
Heteropogon duncani is a species of robber fly in the family Asilidae, described by Wilcox in 1941. As a member of the genus Heteropogon, it belongs to a group of small to medium-sized predatory flies. Robber flies in this genus are known for their distinctive courtship behaviors and perching habits. The species has been documented through limited observations, with 24 records on iNaturalist.
Heteropogon fisheri
Heteropogon fisheri is a species of robber fly (family Asilidae) described by Wilcox in 1965. It belongs to the subfamily Brachyrhopalinae, a group of predatory flies known for their aerial hunting behavior. Like other members of the genus Heteropogon, this species is likely a predator of other insects, though specific natural history details remain undocumented.
Heteropogon johnsoni
Heteropogon johnsoni is a species of robber fly in the family Asilidae, subfamily Brachyrhopalinae. The genus Heteropogon comprises small to medium-sized predatory flies with distinctive courtship behaviors. While specific details about this species are sparse in the provided sources, related species in the genus have been documented to exhibit elaborate aerial courtship displays where males hover before females and use ornamented forelegs to stroke the female's eyes. The species was described by Back in 1904.
Heteropogon maculinervis
Heteropogon maculinervis is a species of robber fly in the family Asilidae, described by James in 1937. The genus Heteropogon comprises small to medium-sized predatory flies known for their distinctive courtship behaviors. As with other asilids, adults are aerial predators that capture other insects in flight. The species name 'maculinervis' refers to spotted or marked wing veins.
Heteropogon martini
Heteropogon martini is a species of robber fly (family Asilidae) described by Wilcox in 1965. As a member of the genus Heteropogon, it belongs to a group of small to medium-sized predatory flies known for their distinctive courtship behaviors and twig-perching habits. The species is part of the diverse asilid fauna of North America, though specific details about its biology remain poorly documented compared to some congeners.
Heteropogon patruelis
Heteropogon patruelis is a species of robber fly in the family Asilidae, first described by Coquillett in 1893. Robber flies in this genus are predatory insects that perch on vegetation to hunt flying insects. The genus Heteropogon is part of the subfamily Brachyrhopalinae, a group characterized by particular morphological features including reduced wing venation. Like other asilids, this species possesses piercing-sucking mouthparts used to subdue prey.
Heteropogon paurosomus
Heteropogon paurosomus is a species of robber fly in the family Asilidae, described by Pritchard in 1935. The genus Heteropogon belongs to the subfamily Brachyrhopalinae. Robber flies in this genus are predatory insects known for their distinctive courtship behaviors. Information specific to H. paurosomus is limited, with only 12 observations recorded on iNaturalist as of the source data.
Heteropogon rubidus
Heteropogon rubidus is a species of robber fly in the family Asilidae, first described by Coquillett in 1893. As a member of the subfamily Brachyrhopalinae, it belongs to a diverse group of predatory flies known for their distinctive hunting behavior and piercing-sucking mouthparts. The genus Heteropogon contains multiple species distributed across North America, with related species documented in forest edge habitats.
Heteropogon rubrifasciatus
Heteropogon rubrifasciatus is a species of robber fly in the family Asilidae, subfamily Brachyrhopalinae. The genus Heteropogon comprises small to medium-sized predatory flies known for their distinctive courtship behaviors. Like other asilids, they are aerial predators that capture other insects in flight. This species was described by Bromley in 1931. Very few specific observations of H. rubrifasciatus have been documented, with only 13 records in iNaturalist as of the knowledge cutoff.
Heteropogon stonei
Heteropogon stonei is a species of robber fly in the family Asilidae, described by Wilcox in 1965. The genus Heteropogon belongs to the subfamily Brachyrhopalinae. Robber flies in this genus are small to medium-sized predatory flies. Specific details about H. stonei's biology and ecology remain poorly documented in published sources.
Heteropogon wilcoxi
Heteropogon wilcoxi is a species of robber fly in the family Asilidae, first described by James in 1934. As a member of the subfamily Brachyrhopalinae, it belongs to a group of predatory flies known for their aggressive hunting behavior and distinctive courtship displays. The genus Heteropogon is characterized by males with ornamented fore tarsi used during mating rituals.
Hodophylax
Hodophylax is a genus of robber flies in the family Asilidae, established by James in 1933. The genus contains at least four described species, all found in North America. Like other robber flies, members of this genus are predatory insects. Specific ecological details remain poorly documented due to limited study of this relatively obscure genus.
Hodophylax aridus
Hodophylax aridus is a species of robber fly in the family Asilidae, described by James in 1933. The species epithet "aridus" suggests an association with arid environments. As a member of the Asilidae, it is a predatory fly. The species is represented by very few observations in biodiversity databases.
Hodophylax halli
Hodophylax halli is a species of robber fly in the family Asilidae, described by Wilcox in 1961. As a member of the Diptera order, this species belongs to a diverse group of predatory flies known for their aerial hunting abilities. The genus Hodophylax is part of the Asilidae family, which comprises approximately 7,000 species worldwide. Specific biological details for H. halli remain undocumented in available sources.
Hodophylax tolandi
Hodophylax tolandi is a species of robber fly (family Asilidae) described by Wilcox in 1961. Robber flies are predatory dipterans characterized by their stout bodies, strong legs, and piercing mouthparts used to capture and subdue prey. This species belongs to the genus Hodophylax, a small group within the diverse Asilidae family. Published records indicate this species is known from limited observations, with iNaturalist documenting only four observations as of the source date.
Holcocephala abdominalis
Golden Goggle Eye
Holcocephala abdominalis is a species of robber fly in the family Asilidae, commonly known as the Golden Goggle Eye. This species is characterized by its distinctive eye morphology, with the genus name 'Holcocephala' referring to the hollow or concave head structure. The species has been documented in the northeastern United States, with records from Vermont and other locations. Like other robber flies, it is a predatory insect, though specific prey preferences for this species remain poorly documented.
Holcocephala calva
Gray Goggle Eye
Holcocephala calva is a species of robber fly in the family Asilidae, commonly known as the Gray Goggle Eye. It is one of approximately 7,500 described species of predatory robber flies found worldwide. The species belongs to the genus Holcocephala, which is characterized by distinctive head morphology. Robber flies in this family are aerial predators that capture other insects in flight.
Holcocephala fusca
Dusky Goggle Eye, Gnat Ogre
Holcocephala fusca is a small robber fly in the family Asilidae, commonly known as the Dusky Goggle Eye or Gnat Ogre. The species is recognized by its distinctive enlarged compound eyes that occupy most of the head. It preys on small flying insects, particularly gnats and other tiny dipterans. The species was described by Bromley in 1951.
Holopogon
Holopogon is a genus of robber flies (Diptera: Asilidae) in the subfamily Brachyrhopalinae. These predatory insects are characterized by their compact, often small to medium body size and distinctive wing venation patterns. The genus was established by Komaroff and Nevski in 1935 and is distinguished from related genera by specific structural features of the male genitalia and wing morphology.
Holopogon currani
Holopogon currani is a species of robber fly (family Asilidae) described by Martin in 1959. The genus Holopogon belongs to the subfamily Brachyrhopalinae, a group of small to medium-sized predatory flies. As with other Asilidae, this species is presumed to be predatory, though specific natural history details remain poorly documented. The species epithet honors an individual with the surname Curran.
Holopogon oriens
Holopogon oriens is a species of robber fly in the family Asilidae, described by Martin in 1959. Robber flies in this genus are predatory insects that typically hunt other arthropods. The species is placed in the subfamily Brachyrhopalinae, a group characterized by particular morphological features of the antennae and facial structure. Very few specific details about the biology or ecology of this particular species have been documented.
Holopogon snowi
Holopogon snowi is a species of robber fly in the family Asilidae, described by Back in 1909. The genus Holopogon comprises small to medium-sized predatory flies characterized by their distinctive wing venation and reduced mouthparts. This species is one of several in the genus distributed across North America.