SARCOPHAGA AND ALLIES 239 



There is some difference in the length of the plu- 

 mosity of the arista; in occasional specimens it is not 

 very much shorter than in many other Sarcophagas. 



Holotype.— Male, No. 20553.. U. S. N. M., from 

 La Fayette, Ind. 



Allotype.— Female, No 20553, U. S. N. M., 

 from Evansville, Ind. 



No. 113, Sarcophaga rileyi n. sp. 



Male. Front .229 of head (average of five, — 

 .212, .212, .234, .236, .253) ; parafrontals and para- 

 facials silvery with a tinge of yellow; frontal stripe 

 reddish, rather narrow, not sharply defined above. 

 Parafacials with the usual row of hairs, ratlier large 

 below; antennse brown or reddish brown; third joint 

 twice as long as second, reaching four-fifth of the way 

 to the vibrissfe, which are at the oral margin. Arista 

 plumose a little over halfway; frontal bristles about 

 ten, several pairs reclinate, gradually diverging, 

 reaching to the middle of the second antennal joint. 

 Ocellar bristles present; outer verticals absent; palpi 

 and proboscis black; bucca one-third the eyeheight, 

 with black hairs to metacephalic suture. Back of 

 head with three to four rows of black hairs, a few 

 whitish ones in the middle and below. 



Thorax gray pollinose, with the usual three to 

 five black stripes; the submedian gray stripes are 

 divided to the suture; ps dc four; ant acr none; prsc 

 one; stpl three; scutellum with two marginals, one 

 preapical and one small apical. 



Abdomen gray pollinose, tessellated, with 

 median black stripe; first and second segments with 

 only lateral bristles ; third with a pair of erect median 

 marginals and two laterals; fourth with a median 

 marginal row of about 14; fifth sternite brown, not 

 divaricate, the two sides touching each other to their 

 tip the same as in peltata, and ending in a rather sharp 

 point. 



Hypopygium black, reddish in middle and be- 

 hind, sometimes quite largely so; first segment polli- 



