310 BULLETIN UNITED STATES GEOLOGICAL SURVEY. 



pleurse with whitish pile. Halteres with a dark brown knob. Abdomen 

 black, shining, with white hair on the sides ; segments 1-5 in the hind 

 corners with a spot of white pollen of moderate size. Legs black, beset 

 with long, white hairs; most of the spines are also whitish, especially 

 toward the tip, the roots being often brownish. Wings hyaline, with 

 black veins; central cross-veins, those at the distal end of the discal 

 cell, the small cross-vein, and the bifurcation of the third vein are very 

 distinctly clouded with brown. 



Sab. — Webber Lake, Sierra County, California, July 22. One speci- 

 men. 



This species does not properly belong in the genus Cyrtopogon, from 

 which it differs in the shape of the antennae ; the third joint is gradu- 

 ally tapering from the base to the tip ; the antennal style is quite as 

 long as the third joint ; altogether, the antenna are like those of Aniso- 

 pogon (Seteropogon olim); but the proportions of the body, the some- 

 what, although moderately, gibbous face, the character of the mystax, 

 etc., are more like those of Cyrtopogon. 



Anisopogon. 



(Heteropogon olim, name changed in Berl. Ent. Zeitschr., 1874, 377.) 

 I have a species from California (G. E. Crotch) and apparently the 

 same from Vancouver Island (H. Edwards); they are not unlike A. gib- 

 bus from the Atlantic States in stature, but certainly different, the wings 

 being nearly hyaline. The specimens are not well preserved enough for 

 a description. 



Holopogon. 



A single female specimen, from Webber Lake, Sierra County, July 25, 

 is nearly altogether black, and certainly different from the described 

 species from the Atlantic States. 



Daulopogon. 



(Loew, Berl. Ent. Zeitschr., 1874, 377 ; formerly Lasiopogon.) 



This genus seems to be quite abundantly represented in California. I 

 have two species taken in the immediate vicinity of San Francisco, a 

 larger one from Yosemite Valley, and two or three from Webber Lake, 

 Sierra County, California. As the species of this genus are rather diffi- 

 cult to recognize from descriptions, I will describe only one, which has 

 very marked characters. 



1. Daulopogon bivittatus Loew, Centur., vii, 57; additions in 

 Berl. Ent. Zeitschr., 1874, 370. — I believe I recognize this species in 

 some specimens which I took near San Francisco, March 28 ; only the 

 small cross-vein is in the middle of the discal cell, rather than beyond it. 



2. Daulopogon arenicola n. sp., $ 9. — Brownish-gray 5 abdominal 

 segments 2-6 each with a pair of semicircular brown spots at the base. 

 Length 7-8 mm . 



Brownish-gray, sometimes with a tinge of yellowish ; the mystax and 



