Phasiinae
Guides
Besseria atra
Besseria atra is a species of tachinid fly in the subfamily Phasiinae. It was originally described as Apinops atra by Coquillett in 1897 before being transferred to the genus Besseria. The species is known from North America and belongs to a group of parasitoid flies whose larvae develop inside other insects.
Catharosia
Catharosia is a genus of tachinid flies established by Rondani in 1868. The genus comprises approximately twelve described species distributed across the Holarctic region. Species within this genus are classified in the tribe Catharosiini within the subfamily Phasiinae.
Catharosia nebulosa
Catharosia nebulosa is a species of bristle fly in the family Tachinidae. It was originally described as Sciasma nebulosa by Coquillett in 1897. The species belongs to the subfamily Phasiinae and tribe Catharosiini. As a tachinid fly, it is likely a parasitoid of other insects, though specific host relationships remain undocumented in the available literature.
Clairvillia
Clairvillia is a genus of tachinid flies established by Robineau-Desvoidy in 1830. The genus belongs to the subfamily Phasiinae and tribe Leucostomatini. Seven species are currently recognized, distributed primarily in the Nearctic region. Like other tachinids, members of this genus are parasitoids, though specific host associations remain poorly documented.
Cylindromyiini
Cylindromyiini is a tribe of tachinid flies comprising approximately 17 genera and 200 species. These flies are parasitoids, with larvae developing inside host insects. The tribe was established by Townsend in 1912 and is classified within the subfamily Phasiinae. The genus Penthosia was formerly included but has been reassigned to the tribe Hermyini.
Epigrimyia
Epigrimyia is a genus of tachinid flies established by Townsend in 1891. It belongs to the subfamily Phasiinae and tribe Cylindromyiini. As with other tachinids, members are presumed to be parasitoids, though specific life histories remain undocumented.
Oestrophasia signifera
Oestrophasia signifera is a species of tachinid fly in the subfamily Phasiinae. Members of this genus are parasitoids of true bugs (Hemiptera), though specific host records for this species are limited. The species has been documented across a broad geographic range in the Americas, from Canada through Central America.
Phasia
Phasia is a genus of tachinid flies (Diptera: Tachinidae) containing approximately 100 described species worldwide. Species are parasitoids of adult true bugs (Hemiptera: Heteroptera), particularly members of families Miridae and Pentatomidae. The genus was comprehensively revised in 2002, with six species-groups defined and 31 new species described from the Palearctic, Oriental, Afrotropical, and Australasian regions. Several genera previously treated as distinct have been synonymized with Phasia.
Phasia aurulans
Phasia aurulans is a tachinid fly (Diptera: Tachinidae) distributed across the Holarctic region, with records from North America, Europe, and Asia. Adults measure 7–9 mm in body length. As a member of the subfamily Phasiinae, it is a parasitoid of true bugs (Hemiptera). The species was revised in a 2002 systematic treatment of the genus Phasia, which synonymized P. splendida and P. meliceris under this name.
Phasia chilensis
Phasia chilensis is a tachinid fly in the genus Phasia, a large and taxonomically complex group of parasitoid flies. The species was originally described as Hyalomya chilensis by Macquart in 1851 and has undergone significant taxonomic revision, with four junior synonyms recently synonymized under it. As a member of the Phasiinae subfamily, it likely functions as a parasitoid of true bugs (Hemiptera), though specific host records for this species require confirmation from the primary literature. The genus Phasia exhibits substantial morphological diversity and has a broad distribution across multiple continents.
Phasiini
Phasiini is a tribe of tachinid flies (family Tachinidae) within the subfamily Phasiinae. Phylogenetic research has substantially revised its circumscription, with most historically assigned genera transferred to other tribes. The tribe currently comprises two genera: Elomya and Phasia. Members are parasitoid flies, with larvae developing inside other insects.
Strongygaster
Strongygaster is a genus of tachinid flies (Diptera: Tachinidae) comprising at least 10 described species distributed across the Americas. The genus is notable for its parasitoid lifestyle, with adults attacking a broad range of arthropod hosts. Strongygaster triangulifera is the most extensively studied species, documented as a parasitoid of adult Coleoptera across multiple families, with additional records from Hemiptera, Dermaptera, Orthoptera, and Lepidoptera. The genus has been reported from North, Central, and South America.
Strongygastrini
Strongygastrini is a tribe of tachinid flies within the subfamily Phasiinae. The tribe comprises six recognized genera: Arcona, Melastrongygaster, Opesia, Rondaniooestrus, Strongygaster, and Vanderwulpella. Members are parasitoid flies, though specific host associations remain poorly documented for most genera. The tribe has been recorded across multiple continents with approximately 500 iNaturalist observations.
Xanthomelanodes
Xanthomelanodes is a genus of tachinid flies comprising 13 described species. As members of the subfamily Phasiinae and tribe Gymnosomatini, these flies are endoparasitoids of true bugs (Hemiptera: Heteroptera). Larvae develop inside their hosts and kill them. The genus was erected by Townsend in 1893 as a replacement name for Xanthomelana Wulp, 1892, which was already in use.