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Subfamily Phthiriinae

Poecilognathus unimaculatus - female Bombyliidae - Tmemophlebia-like ? - female Bombyliidae - Tmemophlebia-like ? - male Hawkweed mountaineer fly - Tmemophlebia - female Dr. Larry Jernigan - Poecilognathus Poecilognathus - ? - Poecilognathus Long Beak Fly - Acreophthiria - female Species Poecilognathus unimaculatus ?
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Diptera (Flies)
No Taxon (Orthorrhapha)
Superfamily Asiloidea
Family Bombyliidae (Bee Flies)
Subfamily Phthiriinae
Numbers
2 tribes, with 24 spp. in 6 genera in our area, ~120 spp. in 10 genera worldwide(1)
Identification
to separate the nearctic tribes(2) :
Metapleuron with micro-pubescence........Phthiriini
Metapleuron bare........Poecilognathini
per (3),
Palpus short, rarely exceeding subcranial margin. R2+3 usually originating proximal to base of cell dm. Last sternite in male with small median notch.............Phthiria (Phthiria Meigen)
Palpus extending at least as far as antennae. R2+3, originating opposite or distal to base of cell dm. Last sternite in male deeply concave on posterior margin.....Phthiria (Poecilognathus Jaennicke)
Range
Worldwide, most diverse in NA(1)
Works Cited
1.Evenhuis N.L., Greathead D.J. (2015) World catalog of bee flies (Diptera: Bombyliidae) web site
2.Homeodactyla and Asilomorpha: Bombyliidae, Vol. 5, Part 13, in 'Flies of the Nearctic Region', edited by G. C. D. Griffiths
Jack C. Hall & Neal L. Evenhuis. 1980. E. Schweizerbartsche Verlagsbuchhandlung, Stuttgart.
3.Manual of Nearctic Diptera Volume 1
Varies for each chapter; edited by J.F. McAlpine, B.V. Petersen, G.E. Shewell, H.J. Teskey, J.R. Vockeroth, D.M. Wood. 1981. Research Branch Agriculture Canada.