274 THOMAS SAY FOUNDATION 



Holotype. — In the Hough collection; paratype 

 male, No. 20570, U. S. N. M., from Tifton, Ga. 



The relationships of this species are evidently 

 with Nos. 47, 51, 56, all of which have the recurved 

 hook on the back of the penis. 



No. 131. Sarcophaga xanthosoma n. sp. 



Male. liike assidua except in the following 

 characters: Parafrontals and parafacials, posterior 

 orbit of eye and front of bucca golden pollinose, the 

 same color on the pollen above and below the lateral 

 suture of the thorax, and on the sides of the second, 

 third and fourth abdominal segments. Scutellum 

 with a pair of small marginal bristles; fifth sternite 

 standing up prominently, divided but not divergent, 

 with a slender yellow point on each side of the division 

 at hind angle, bearing a few small black hairs: from 

 the base of these points the lateral parts are wide, yel- 

 low, and quite conspicuous. 



Hypopygium red with yellow pollen; first seg- 

 ment with a row of long bristles behind ; forceps yel- 

 low, straight, tapering, with shining black tips. 

 Viewed from behind they are rather uniformly sepa- 

 rated in all their length, obliquely truncate, with a 

 minute angle on the outer side, the inner side long- 

 est; accessory plate triangular, the free angle slight- 

 ly drawn out; posterior clasper brownish, somewhat 

 stout at the base, the tip considerably hooked for- 

 ward; anterior clasper yellow, erect, stout, the apex 

 turned forward, thin and straight; penis with a single 

 segment, reddish in color, apex brownish; the back 

 plate has on each side near the base a conspicuous lobe 

 pointing forward, characteristic of the assidua group ; 

 the transverse plate on the front is bent toward the 

 apex and extends about as far as the tip of the organ ; 

 on the two sides near the apex it gives off a branch 

 extending forward and with tips bending toward the 

 base. The front side of this is covered with scattered 

 spines suggesting the structure in hakeri. 



