312 ERNEST A. BACK. 



are characterized by the broad but not "goggle-like" head, 

 the well-arched thoracic dorsum and the very stout hind tibiae 

 and their swollen metatarsi. In this last respect they resem- 

 ble much the species of Holcocephala. 



fHolopogon appendiculatus Bigot is not an Holopogon; I do 

 not know what it is. 



SYNOPSIS OF SPECIES. 



1. Wings deep black, except at tip atripeimis, lautus. 



Wings not deep black 2. 



2. Tibiae and tarsi reddish snowi. 



Legs wholly black 3. 



3. Wholly white pilose species seniculus. 



Not wholly white pilose species 4. 



4. Pile of body almost wholly brownish, very dense, especially on 



venter of abdomen from base to tip umbriniis. 



Pile of thoracic dorsum chiefly black; white in varying amounts 



on the anterior and posterior portions -j IK«» ni ijytii« 



Holopogon atripeimis n. sp. (PI. XI, fig. 1.) 



cf 9- — Length about 6 mm. — Wholly deep black, the wings deep 

 black, except on the outer fourth, where they are paler, but not pure 

 hyaline. 



Wholly black; face and front grayish pruinose; the face of the male 

 clothed with black hair, with a few white ones intermixed; that of 

 the female with a predominance of the white hairs. In the male the 

 pile of the front, dorsum and pleura? of thorax is black; that of the 

 coxas and abdomen white ; in the female the pile of the pleurae and 

 part of that of the dorsum is white. Legs black, with white pile and 

 slender black bristles. Halteres yellowish. Wings black, on the dis- 

 tal fourth paler, but not pure hyaline; many of the veins very narrowly 

 bordered with a pale line; venation normal. 



Type. — Am. Ent. Soc. of Phila. One male and one female 

 specimen. 



Habitat. — The type localities are Highrolls (June 2, 1902), 

 and Cloudcroft (June 19, 1902), N. M. 



In both specimens the thorax is greased, there are traces of 

 a golden pruinose spot on the humeral angles of the thorax, 

 and a paler bloom on the pleurae. I regard the black wings 

 as the best distinguishing feature. 



