500 



bulletin: museum of comparative zoology. 



yellow; liypopygial projection yellow; wings tinged with brown, 

 venation piceous. Front as broad as high; carinate above the 

 median pair of ocellar bristles, the carina curving down laterally 

 below the lateral ocellar bristles; postantennal pair of bristles close 

 together, not far below the level of the next row which form a nearly 

 equidistant series curved downwards medially; upper row slightly 

 curved upwards medially; ocelli not on a tubercle; all frontal bristles 

 large. Postocular cilia enlarged at upper two thirds of eye. Cheeks 

 each with two macrochaetae. Antennae small, nearly round; arista 

 nearly twice as long as the front. Palpi not enlarged, with stout 

 bristles below on apical third. Mesonotum shining, pubescent, 

 sHghtly bristly along the sides; one pair of dorsocentral bristles. 

 Scutellum short and broad; posterior pair of bristles far apart and 

 very long, anterior pair much smaller. Propleurae hairy, with two 



bristles near the coxa and 

 one large one midway be- 

 tween the coxa and spira- 

 cle; also a bristle above 

 the spiracle; mesopleura 

 not hairy. Abdomen with 

 second and sixth segments 

 elongated; third, fourth, 

 and fifth subequal in 

 length; surface dull except 

 at apex, without hairs except a few on the sixth segment which also 

 bears some bristles on posterior edge; hypopygium rather small; pro- 

 jecting piece slender, bearing only a few very small hairs towards apex. 

 Legs stout; front tibia with a small bristle just beyond basal third, but 

 no others; middle tibiae with a pair at basal third and a small one on 

 anterior surface just before apex; anterior surface on apical third with 

 transverse comb-like rows of very short bristles; hind tibiae with a 

 shorter patch of similar comb-like rows at apex, without bristles or setu- 

 lae before apex although the hairs are larger on the seam and just out- 

 side it on the apical half of the tibia; hind femur without a patch of 

 short bristles on inner side at base. Wings long and narrow; two and 

 one half times as long as broad; costa extending to the middle or 

 barely beyond; first section of the costa twice as long as second and 

 third together, third nearly as long as second; fork rather acute; 

 fourth vein feebly curved, recurved at apex; fifth nearly straight; 

 sixth sinuate; seventh strongly curved basally; costal cilia rather 

 short, about as long as the humeral cross-vein. Halteres light fuscous. 



Fig. 1. — Dohrniphora alleni Brues. Wing. 



