240 THOMAS SAY FOUNDATION 



nose, with a row of small bristles behind; second 

 rounded, shining, not bristly ; forceps blackish, rather 

 straight, flat and bare, thin in profile, turned forward 

 to a sharp point at tip. Viewed from behind they 

 are slender, diverging slightly at the base and nearly 

 parallel the remainder of the way, turning in a little 

 at the tip. Accessory plate brown, short, the free 

 part rounded and slightly set off from its base by a 

 constriction; posterior clasper black, tapering and 

 curved forward, rather sharp; anterior clasper very 

 wide and flat, brown or black, concave on posterior 

 side, with a small curved point at the outer edge; 

 penis brown, basal segment shortened, inconspicuous ; 

 distal one convex, smooth and shining on its posterior 

 and lateral surface, in shape much resembling a ven- 

 tilating funnel on a steamship ; front with a deep cen- 

 tral concavity, on the basal side of which is a trans- 

 verse concave brown plate; laterally this concavity is 

 bounded by a sharp longitudinal ridge ; apically there 

 is a large spreading pair of soft, light-colored lobes, 

 delicately covered with hair on the front side; these 

 folds or flaps are the most conspicuous features of 

 the organ, projecting beyond the harder parts. 



Legs black; middle femur with a distinct comb 

 on the hind side near the tip; middle tibia with two 

 bristles on the outer front side; hind tibia not villous. 



Wings hyaline ; no costal spine ; third costal seg- 

 ment rather longer than the fifth; first vein bare; 

 third hairy nearly to the crossvein. 



Female. Front .289 of head, with the usual or- 

 bitals and outer verticals; scutellum without apicals; 

 genital segments blackish; the fifth tergite forming 

 a broad crescent which is pollinose throughout and 

 sometimes reddish. The fifth sternite is deeply 

 notched in its middle, the two projecting lateral lobes 

 black and polished. Middle femur without comb. 



Length 7-10 mm. 



Seven males and one female, a part of the mate- 

 rial described by Rilev as Sarcophaga saiTacenice, 

 bearing labels "Collection C. V. Riley," "342x," and 



