OF WASHINGTON. 183 



bearing a subapical pair of stout bristles. Abdomen polished, first seg 

 ment gray pruinose on the base and sides, second with a gray pruinose 

 fascia near the base and an oblique spot in each hind angle, segments three 

 to six each with a gray pruinose fascia at the base connected at either end 

 with an oblique spot that extends to the hind angle of the segment, the 

 spots on the third segment of the female separated from the fascia; each 

 of these fasciae is rather strongly narrowed in the middle of the posterior 

 side ; a gray pruinose spot on either side of the seventh segment. Wings 

 hyaline, veins and cross-veins at bases of the discal, posterior and sub- 

 marginal cells distinctly but rather narrowly clouded with brown, small 

 cross-vein near two-thirds length of the discal cell. Length 7 mm. 



Organ, New Mexico. A specimen of each sex collected by 

 Prof. T. D. A. Cockerell. 



Type. No. 7955, U. S. National Museum. 



Cyrtopogon nigricolor, n. sp. 



Near rattus, but the bristles of the tibia; are black, the abdomen is largely 

 polished, etc. Black, the halteres yellowish, the knees narrowly brownish 

 yellow. Hairs of the front whitish, on the vertex mixed with black, bris 

 tles of upper part of occiput black, hairs of the lower part white, mystax 

 mixed white and black, mounting nearly to the antennae, face strongly 

 convex; first joint of antennae slightly longer than the second, the latter 

 with a pair of stout black bristles on the under side, third joint one and 

 one-fourth times as long as the first two taken together, strongly con 

 stricted a short distance beyond the base and considerably narrowed at the 

 apex, about three times as long as the slender style. Bristles of the body 

 and on the tibiae and tarsi black. Brown vittse of mesonotum diffuse, the 

 hairs sparse and rather short, mesopleura, pteropleura and sternopleura 

 bare, hairs of hypopleura chiefly black ; scutellum flat, yellowish gray 

 pruinose, almost bare, with six strong marginal bristles. Abdomen pol 

 ished, sides of first segment, bases and hind angles of the three following 

 ones, gray pruinose (the remaining segments may also have had similar 

 markings but these do not now appear, possibly owing to the partial 

 greasing of the specimen). Tarsal claws black. Wings hyaline, the 

 apical half faintly tinged with yellowish, small cross-vein slightly beyond 

 middle of discal cell. Length 9 mm. 



Los Angeles Co., Cal. A female specimen collected by the 

 writer in June. 



Type. No. 7956, U. S. National Museum. 



Cyrtopogon tibialis, n. sp. 



Near plausor, but the mystax is black and rather sparse, not concealing 

 the ground color, scutellum flat, etc. Black, the halteres yellow, the tibiae, 



