44 THOMAS SAY FOUNDATION 



Genus AGRIA Robineau Desvoidy. 



Robineau-Desvoidj^, Myodaires, 1830, p. 376, 

 established the genus with the following definition: 

 "Antennis paulisper incrassatis, cheto villoso; abdo- 

 men punctatum." He explained that he uses the 

 term villoso as meaning subpliuiiose. He described 

 six species, all but one of which are regarded as syno- 

 nyms of Musca afjinis Fallen by Bezzi in vol. iii of 

 the Palaearctic Catalogue; the sixth he recognizes 

 as a Sarcophaga; affinls thus becomes the type 

 of the genus, and is so designated by Coquillett, 

 Type-Sp"ecies, 1910. Macquart, Hist! Nat. Dipt., 

 ii, 229, 1835, recognized affinis as belonging to this 

 genus and as being the prior name for at least one of 

 Desvoidy's species; he however included a number of 

 diverse forms which later caused some confusion in 

 restricting the genus. 



Affinis occurs in North xVmerica, having been 

 identified for Dr. Parker by Dr. Bottcher, and for 

 me by Parker. Its principal generic characters are 

 as follows: 



Front in male narrowed in front of the ocelli, in 

 female rather wide, in both with the median stripe 

 wider than the side; in the female the parafrontal has 

 numerous rather large hairs, continuous with those of 

 the parafacial, which are much tlie same as in Sar- 

 cophaga. Frontals about 12, widening gradually be- 

 low, reacliing nearly to middle of second antennal 

 joint. Antenna? reaching nearly to oral margin, the 

 arista with short and rather dense plumosity extend- 

 ing about half its length, Aibrissa? at oral margin; 

 eyes bare; palpi normal, proboscis short and fleshy; 

 occiput without any pale beard. Fourth vein at bend 

 witli a square angle and a slight fold; its end is as far 

 before the apex as half the length of the fifth costal 

 segment. Hypopygium large, mostly occupied with 

 the first segment, which has a pronounced hump be- 

 fore its middle, forming the apex of the abdomen in 

 profile; a row of bristles before the hump; second 

 segment small. 



