20 



DIPTERA OF NORTH AMERICA. 



[PART III. 



In the Dipteres Exotiques the corresponding part of the sys- 

 tem assumes the following shape, about which I have only to ob- 

 serve that in this work Macquart brings in only those genera in 

 which he intended to describe, or at least to mention, exotic 

 species ; the genera Toxoneura, Lucina, Tetanops, Otites, Platy- 

 cephala, etc., although not mentioned in this list, ought, in order 

 to render it complete, to be transferred to it from the former. 



Scatomyzidce. 

 Scatophaga. 



SciomyzidoR. 

 Dryomyza, 

 Tapeigaster, 

 (Sapromyza,) 

 Pbysegenua, 



Sciomyza, 

 Helomyza, 

 Curtonotum. 



Psilomyd(B. 



! Eumetopia, 

 Ectecephala, 

 ! Dorycera. 



Ortalidce. 



! Oxycephala, 

 ! Loxoneura, 

 I Platystoma, 

 I Camptoneura, 

 ! Heterogaster, 

 Rhopalomera, 

 ! Euripalpus, 



