Ulidiidae
Guides
Tritoxa decipiens
Tritoxa decipiens is a species of picture-winged fly in the family Ulidiidae, described in 2021 from a type locality near Smithers, British Columbia. It is one of seven recognized species in the Nearctic genus Tritoxa, including two species newly described in the same revision. The species can be differentiated from congeners by wing patterns, though examination of male genitalia is required for confident identification of certain sympatric species.
Tritoxa flexa
Black Onion Fly
Tritoxa flexa, commonly known as the Black Onion Fly, is a Nearctic species of picture-winged fly in the family Ulidiidae. It was first described by Wiedemann in 1830 and is one of seven recognized species in the genus Tritoxa. The species possesses distinctive patterned wings characteristic of ulidiid flies. A 2021 revision of the genus provided species illustrations, distribution maps, and a diagnostic key to differentiate T. flexa from congeners.
Tritoxa incurva
Tritoxa incurva is a species of picture-winged fly in the family Ulidiidae, originally described by Loew in 1873. It is one of seven recognized species in the Nearctic genus Tritoxa, distinguished by its bold wing patterns. The species occurs in the eastern United States, where adults are active from May through October in grassy meadow habitats.
Tritoxa pollinosa
Tritoxa pollinosa is a species of picture-winged fly in the family Ulidiidae, described by Cole in 1919. It is one of seven recognized species in the Nearctic genus Tritoxa, distinguished primarily by wing pattern characteristics. The species occurs in the United States.
Tritoxa ra
Tritoxa ra is a species of picture-winged fly in the family Ulidiidae, one of seven recognized species in the Nearctic genus Tritoxa. The species was originally described by Harriot in 1942. Like other members of the genus, it possesses distinctive wing patterns that aid in identification. The species occurs in the United States.
Tritoxa undescribed-sp-apache
Tritoxa undescribed-sp-apache is an undescribed species within the genus Tritoxa, a group of picture-winged flies in the family Ulidiidae. The provisional name indicates this taxon has been recognized as distinct but not yet formally described in scientific literature. Members of Tritoxa are characterized by patterned wings and are often associated with decaying plant material. This particular species appears to be associated with the Apache region of North America.
Ulidiini
picture-winged flies
Ulidiini is a tribe of picture-winged flies in the family Ulidiidae, comprising three genera and approximately 100 species. Members are small, mostly black and brown, and inhabit arid and sub-arid regions of the Palaearctic. The tribe was established in 1835 with Ulidia as its type genus.
Ulidiotites dakotana
picture-winged fly
Ulidiotites dakotana is a species of picture-winged fly in the family Ulidiidae, described by Steyskal in 1961. It belongs to a small genus within a family characterized by distinctively patterned wings. The species is known only from the United States, with limited published information available regarding its biology and ecology.