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You don't see a lot of color illustrations of flies in the classic natural history literature, so I was pleased to find this one, from The families and genera of North American Diptera, by Charles H. Curran (1894-1972). This is the one color plate, following page 20 (Biodiversity Heritage Library link ). BHL indicates this work appears to be out of copyright. The artist "Adolph Klein", is obscure, but a few Internet searches show that he was active in New York City in the 1930's and did some other zoological illustrations.  I cleaned up some printing errors in this illustration, adjusted the background a bit, descreened, and downsampled it. left column Sphecomyia vittata Wied.(Syrphidae) Aloipha cingulata Schiner. (Stratiomyidae) = Merosargus cingulatus (apparently!) Dejeania vexatris O. S. (Tachinidae) = Adejeania vexatrix middle column Hyperalonia hela Erichs (Bombyliidae) = Ligyra hela (Erichson, 1848) Mydas clavatus Fabr. (Mydaidae) Tabanus cinctus Drury. (Tabanidae) = Hybomitra cincta  right column Richardia telescopica Gerst. (Otitidae) Michogaster niger Schm. (Otitidae) Didea fuscipes Macq. (Syrphidae)