80, pp. 1-8 24 March 1967 PROCEEDINGS OF THE BIOLOGICAL SOCIETY OF WASHINGTON A KEY TO THE GENERA OF ANTHOMYIINAE KNOWN TO OCCUR IN AMERICA NORTH OF MEXICO, WITH NOTES ON THE GENUS GANPERDEA ALDRICH (DIPTERA, ANTHOMYIIDAE ) By George C. Steyskal Entomology Research Division, Agr. Res. Sew., U. S. Department of Agriculture, Washington, D.C. Although the Anthomyiinae include many forms of economic importance, no satisfactory key to all the genera found in America north of Mexico is available. It is hoped that the key here presented will enable workers to place their material in the proper genus more easily and surely. The classifica-tion is that used by Stone, et al. ( 1965 ) . The genus Ganperdea Aldrich for a long time has been considered a synonym of Neohylemyia Malloch. It is shown here that the type-species of the two genera are sufficiently different to necessitate either recognizing the genera as dis-tinct ( as is here done ) or broadening the concept of Leuco-phora Robineau-Desvoidy enough to contain both of them. Family ANTHOMYIIDAE Without well-developed postscutellum or hypopleural bristles; sixth (anal) wing vein nearly always attaining wing margin although often very weakened apically; third and fourth wing veins never distinctly con-vergent apically. Key to Subfamilies of ANTHOMYIIDAE^ 1 (2). Stpl 1 to 3; front equally wide in both sexes and always without cruciate interfrontal bristles; lower calypter never projecting beyond upper; scutellum without fine 1 The following abbreviations are used: acr, acrostichal (hairs); ad, anterodorsal bristle; av, anteroventral bristle; dc, dorsocentral bristles; pd, posterodorsal bristle; pra, prealar bristle; pv, posteroventral bristle; sa, supra-alar bristle; stpl, stemo-pleural bristles; tj, t^, fore and hind tibiae, respectively. 1— Proc. Biol. Soc. Wash., Vol. 80, 1967 ( 1 )
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