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furcatus group

Chrysops 8-02-09 01b - Chrysops - female Deer Fly - Chrysops coloradensis - female Deer Fly - Chrysops coloradensis - female Tabanidae? - Chrysops proclivis - female Deer Fly ? - Chrysops furcatus Mystery Horsefly - Chrysops coloradensis - female Chrysops furcatus - female Deer Fly - Chrysops coloradensis
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Diptera (Flies)
No Taxon (Orthorrhapha)
Infraorder Tabanomorpha
Family Tabanidae (Horse and Deer Flies)
Subfamily Chrysopsinae (Deer Flies)
Tribe Chrysopsini
Genus Chrysops
No Taxon furcatus group
Synonyms and other taxonomic changes
Chrysops coloradensis
Chrysops furcatus Walker, 1848
Chrysops luteopennis Philip, 1936
Chrysops proclivis Osten Sacken, 1877
Chrysops surdus Osten Sacken, 1877
Remarks
The species here are similar and misidentification of photos is possible. Philip (1936) remarked that the group was heterogeneous, i.e. with superficial resemblence. His "furcatus group" may not be considered a "species group" by modern standards.
Print References
Philip, C.B. 1936. The furcatus group of western North American flies of the genus Chrysops (Diptera: Tabanidae). Proc. ent. Soc. Wash. (1935) 37:153-161.