328 



NORTH AMERICAN DIPTERA. 



ropean forms. But there is reason in the objection to the 

 use of a term derived from a generic name which is clearly 

 a synonym. The name Cordyluridse, applied by Loew, 

 is the oldest name otherwise, and must take precedence 

 over Scatophagidse, which some authors have used. 

 Many of the new genera erected by Becker have been 



Fig. 134. Cordyluridse. Scatophaga, male; 2, Acicephala polita, 

 head; 3, Pselaphephila similis, head; 4, Orthoch<zta(l}gilvipes, head; 

 5, Spathiophora, sp. head; 6, Parallelomma varipcs; 7, Hydromyza 

 conflnens, head. 



recognized in North America within recent years, and 

 doubtless others will be, since the family has received 

 comparatively little study with us. For further study of 

 the group, the reader is advised to procure his paper. I 

 give only such genera in the following table as have been 

 authoritatively recognized from North America, the 



