68 Journal New York Entomological Society. [Vol. xxiv, 



Promachus nigropilosus new species. 



Head grayish-white pollinose, beard and mystax white, the latter with a 

 few black hairs intermixed ; occipito-orbital bristles black. Thorax black, 

 somewhat shining, very faintly grayish pollinose ; one brownish median and 

 on each side a more or less distinct lateral stripe ; dorsum clothed sparsely 

 with short, black hairs, bristles black. Pleurae very faintly pollinose and with 

 sparse, black hairs ; humeri reddish. Abdomen black, shining, sides of the 

 segments rather feebly gray pollinose, apical margins even more faintly grayish 

 pollinose ; dorsum and venter with sparse, short, black hairs, at sides of the 

 first few segments the hairs are longer. Hypopygium densely covered with 

 silky white hairs. Wings pure hyaline. Legs black, except the outer surface 

 of the front and middle femora, the upper side of hind femora and the greater 

 part of the tibiae which are reddish, covered with short, sparse, black hairs and 

 bristles, except the front femora, which has the hairs mostly grayish-white. 

 Length 21 mm. 



One male, Shasta, Co., Cal., received from George Franck. 



In Hine's key to the species of Promachus''- this new species would 

 go near minusculus from which it differs in being more shining and 

 having no white hairs on thorax and abdomen, except on the hypo- 

 pygium. The pollinosity of thorax and abdomen is also much more 

 feeble than in any other species. 



Asilus hypopygialis new species. 



Head white pollinose, facial gibbosity moderately large, not reaching to 

 the antennae, mystax black above, white below, beard white ; ©cellar and 

 occipito-orbital bristles black; third joint of antennae a little longer than the 

 two preceding joints, arista nearly as long as the third joint. Thorax cov- 

 ered with yellowish-gray dust ; brown median stripe prominent and divided 

 narrowly ; pleura covered rather densely with a paler gray dust and with very 

 few white hairs. Scutellum almost without hairs, two apical bristles black. 

 Abdomen covered with grayish-brown pollen, venter, sides and base of the 

 second to fourth segments with gray pollen ; hairs on the dorsum blackish, 

 bristles and hairs at sides and venter white. Hypopygium thickened, at middle 

 distinctly wider than the abdomen, black, at apex reddish, covered sparsely 

 with white hairs. Wings hyaline, slightly clouded towards apex. Legs red- 

 dish-brown, except the outer side of the femora, tip of tibiae and tarsal joints 

 thre to five, which are black; femora and tibiae sparsely hairy. Length 15 mm. 



One male, Beaver Canon, Utah (Doll and Engelhardt). 

 This species belongs in the subgenus or group Heligmoneura. 

 the male genitalia are nearly two milimeters wide at apex. 



1 Ann. Ent. Soc. Am., Vol. IV, p. 165. 



