SARCOPHAGA AND ALLIES 131 



and two laterals ; fourth segment with a marginal row 

 of about 20, the outer ones gradually diminishing. 



Hypopygium red; first segment red with gray 

 pollen, on the hind margins with an interrupted row 

 of smallish bristles; second segment red with rather 

 distinct hump behind, covered with scattered erect 

 hairs but not bristly; forceps black, straight, very 

 shining, slender in profile, abruptly turned forward 

 at the end; from behind they run close together al- 

 most to the tip, where they are suddenly cut away on 

 the inner side; accessory plate yellow, broad, with a 

 blunt point at the attached end and a more slender 

 one at the free end; posterior clasper dark brown, 

 rather long, curved forward at tip and excised on 

 front side; anterior clasper very short and low, but 

 with a distinct, brown hook; penis slender, the basal 

 joint elongated, the distal joint still longer, rather 

 square in cross section on the basal two-thirds, the 

 apical third suddenly widened with a black head- 

 like extension forward, from which arise several 

 horns at the outer corners and a single long lateral 

 process on each side. On the back of the organ in the 

 middle near the tip is a long recurved hook divided 

 near the base into two divergent points. The sclerite 

 which forms the back of the distal segment diverges 

 broadly at the apex and is produced into a sharp re- 

 curved horn at each of the two tips. Just on the inner 

 side of each of these horns is a process directed back- 

 ward which bears minute hairs giving it a fringed ap- 

 pearance. Fifth sternite blackish, bearing a wide 

 brush on each side of the incision, the two brushes in 

 contact or nearly so for their entire length. 



Legs black ; middle femur with a well developed 

 short comb on the lower hind side near the tip ; middle 

 tibia with two bristles on the outer front side; hind 

 tibia without villosity. 



Wing hyaline with a small costal spine; third cos- 

 tal segment about as long as the fifth and sixth to- 

 gether ; first vein })are ; third with a few hairs. 



