268 THOMAS SAY FOUNDATIOX 



No. 128. Sarcophaga robusta n. sp. 



Male. Front .231 of head (average of five, — 

 .223, .226, .234, .235, .236) ; parafrontals and para- 

 facials together with face and bucca covered with 

 smooth, white pollen having a slight yellowish cast; 

 frontal stripe reddish, not sharply defined; frontal 

 bristles about 11, several very weak below the upper- 

 most one, the rows diverging moderately below and 

 reaching to the middle of the second antennal joint; 

 paraf acials with a few hairs, none very large ; anten- 

 nae reddish brown, the third joint three times the sec- 

 ond and reaching three-fourths of the way to the vi- 

 brissa, which are at the oral margin ; arista plumose 

 for half its length; ocellars large; outer verticals ab- 

 sent; palpi and proboscis black, ordinary, bucca one- 

 third the eyeheight, clothed with fine black hairs which 

 gradually blend with the pale ones before the meta- 

 cephalic suture. Back of the head with two rows of 

 black hairs, its middle part covered with whitish ones, 

 which are conspicuous below. 



Thorax yellow, gray pollinose, with the usual 

 three to five black stripes, the sub-median gray stripes 

 divided to the suture. Ps dc 4 or 5, only the hind ones 

 very large; ant acr barely distinguishable from the 

 hairs surrounding them; prsc one; stpl two to four; 

 scutellum with the usual two large marginals, one 

 small preapical and one larger apical. 



Abdomen light gray pollinose, tessellated, with 

 three somewhat shifting dark stripes ; fourth segment 

 considerably red behind. In profile the abdomen is 

 uncommonly deep toward the apex. First three seg- 

 ments with only lateral bristles; fourth with a mar- 

 ginal row of about 10; fifth sternite yellow, near the 

 base on each side with a black, bare, elevated surface, 

 behind which is a yellow expansion clothed with a 

 black brush. 



Hypopygium yellow; first segment large, polli- 

 nose, sometimes a little inf uscated ; at its hind margin 

 with a row of stout bristles; second segment globose, 

 subshining, with a few scattered erect stout hairs, 



