SARCOPHAGA AND ALLIES 269 



some bristly. Forceps of unique structure, their at- 

 tached part being drawn out into a pair of yellow 

 pointed organs very much like the forceps of the other 

 species ; in front of this, however, the organ is in pro- 

 file deeply excised, then suddenly curves backward 

 into a pair of strong black-tipped hooks lying close 

 against the penis. In tlie back view^ the yellow points 

 are not divergent, the black ones are cut out so as to 

 leave a square opening, into which the distal part of 

 the penis fits when tilted back. Accessory plate 

 drawn forward out of its usual position so that it 

 lies against the side of the penis; it is yellow and 

 rather slender. The claspers are very small, black- 

 tipped plates lying against the basal segment of the 

 penis. Penis with a short yellow basal segment; tlie 

 distal segment rather spoon-shaped, narrow, at base, 

 widening in a broad, curved plate at each side which 

 joins a keel along the back. The keel is yellow, bor- 

 dered with black and the black color also extends 

 along the apex of each of the lateral plates. On the 

 front of the distal segment near the tip is a round, 

 blunt black tube. 



Legs black; middle femur with comb beliind; 

 middle tibia with rather long dense hair on the inner 

 side toward the tip, but not strictly villous; on its 

 outer front side bearing a single bristle; the liind 

 femur stout with short stubby bristles below in irreg- 

 uular rows; the hind tibia? are noticeably shorter than 

 their femora and are not usually villous although 

 sometimes near the tip on the inner side there are 

 some rather long hairs, on account of which I have 

 included the species in my table in Group F also. 



Wings hyaline; no costal spines; third costal seg- 

 ment as long as tlie fifth and sixth together; first vein 

 bare; third hairy halfway to the crossvein. 



Female. Front .339 of head (average of five, — 

 .332, .333, .335, .344, .349). The usual orbitals and 

 outer verticals well developed; scutellum without api- 

 cals; third abdominal segment without median mar- 

 ginals; fourth yellow at ti]). Genital segment yellow 



