A SYNOPSIS OF THE GENERA OF AGROJ^FfZIDiE, WITH 

 DESCRIPTIONS OF NEW GENERA AND SPECIES. 



By J. R. IVIalloch, 



Of the Bureau of Entomology, United States Department of Agriculture. 



INTRODUCTION. 



• My original intention was to give a revision of the genera and 

 species in this family, but I have found it impossible to accomplish 

 this in the time at my disposal, so I have confined my work to that 

 presented in this paper and to a re^dsion of the species of the genus 

 Agromyza, which is to appear in the Annals of the Entomological 

 Society of America. 



I have revised the nomenclature so as to bring it into conformity 

 with that used by the most recent writers who have dealt with the 

 family. 



Wliere new species are described in old genera the species pre- 

 viously^ known from this country are tabulated, except in Phytomyza, 

 and this is also done where the generic relations are different from 

 those used in Aldrich's Catalogue of North American Diptera. 



The species of this family may be known from the other Acalyptrate 

 Muscidae by the follomng characters: Ej^es separated in both sexes, 

 bare, or pilose; arista bare, or pubescent, never combed; vibrissas 

 differentiated, except in Ochthiphilina^ ; palpi and proboscis often 

 enlarged; post-vertical bristles generally present; thorax with always 

 at least one pair, generally two, of dorso-central macrochaetfe; at 

 least the sternopleura mth one bristle; legs without any preapical 

 bristle. In Agromyza there are generally two postero-dorsal setulse on 

 mid tibia but the dorsal surface is without bristles ; mngs with sub- 

 costal vein indistinct, incomplete, or joining first vein; costa reaching 

 to vein three or four; outer cross vein rarely much beyond wing 

 middle, sometimes absent (Phytomyza and Paramyia) ; basal cells 

 always distinct. 



In the EphydridsB and Drosophilidae the basal cells are generally 

 indistinct, or absent; and the arista is often combed. The genera in 

 Geomj^zidse have often the dorsal preapical tibial bristle distinct and 



Proceedings U. S- National Museum, Vol, 46— No. 2018- 



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