FLIES OF GENUS CONOPS — CAMRAS 161 



Mallochoconops represents one type of intergrade between Conops 

 and Physoconops, lacking the ocellar swelling as in the former, and 

 having the narrower abdominal base of the latter. Microconops 

 represents another type of intergrade, having the wider abdominal 

 base of Conops and the ocellar swelling of Physoconops. 



Genus Physoconops Szilady 



Physoconops Szilady, Ann. Hist.-Nat. Mus. Nat. Hungarici, vol. 24, p. 588, 1926. 



Most of the New World species formerly placed in Conops belong 

 here. The species fall into the following subgenera. 



Key to the subgenera of Physoconops 



1. Third antennal segment more than two-thirds of second; front shorter than 



wide 2 



Third antennal segment less than two-thirds of second 5 



2. Vertex large, as long as front Gyroconops, new subgenus 



Vertex small, much shorter than front 3 



3. Abdominal apex unusual, pointed in male, slightly S-shaped in female. 



Shannonoconops, new subgenus 

 Abdominal apex normal 4 



4. Third antennal segment relatively thick, and usually longer than second; 



dark pattern in first posterior cell narrow; pollinose pleural stripe joining 



spot medial to humerus Aconops Krober 



Third antennal segment relatively slender, rarely longer than second, and 

 thick; dark pattern in first posterior cell, if present, is relatively wide; if 

 suggestive of above, pleural stripe not joining humeral spot. 



Pachyconops, new subgenus 



5. Vertical swelling triangular, pointed anteriorly; front shorter than wide. 



Kroeberoconops, new subgenus 

 Vertical swelling rounded; front as long as wide or longer. 



Physoconops Szilady 



Pachyconops, new subgenus 



Similar to the subgenus Physoconops, but having the front shorter 

 than wide, and having antennal segment 3 about equal to segment 2. 

 The triangular polished space on the posterior margin of the eye is 

 very small or absent. 



Typje: Physoconops bulbirostris (Loew). 



This subgenus contains several diverse elements, but enough inter- 

 gradation to prohibit any subdivision at this time. Some of the females 

 have a very long robust theca, and in others it is short. The species 

 with the short theca usually lack the triangular mark of the eye. 

 The species with the short theca also usually have the abdominal 

 segments 2 and 3 longer and the remainder of the abdomen more 

 slender. 



