182 D. W. COQUILLETT. 



Sciitelliim bi'assy-yellow tomentose, bristles black. Abdotneu black toraeiitose, 

 a cross-band of white and pale yellow tomentura on bases of second and fourth 

 segments, tomentum of last three segments largely brassy-yellow ; pile of dorsum 

 very sparse, black, of sides of first two segments abundant, white, on sides of 

 remaining segments sparse, black, and intermixed with long, cuneate black 

 scales, those on sides of last segment white; venter white tomentose, that on 

 last three segments brassy-yellow, the pile white and black. Legs whitish to- 

 mentose, front tibiae destitute of bristles, claws of front tarsi small. Wings 

 hyaline, subcostal cell, except its extreme apex, yellow. Length 6 mm. 



San Diego County, Cal. A single specimen in May. 



59. A. geniella n. sp. — Black. Front and face brassy-yellow tomentose, 

 black pilose; face considerably produced below. Proboscis not projecting. An- 

 tennsE having the first joint one and a half times as long as the second, black 

 pilose, third joint gradually tapering from base to apex. Occiput, thorax and 

 scutellum bi-assy-yellow tomentose, bristles of the two latter black, pile of front 

 end of thorax light yellow, of the sides, pleura, breast and coxse black. Alido- 

 men black tomentose, bases of second and third segments and nearly all of the 

 last two segments brassy-yellow tomentose; pile of dorsum very sparse, black, 

 that on sides of first two segments mixed light yellow and black, on sides of 

 remaining segments very sparse, black; venter mixed black and brassy-yellow 

 tomentose. Legs black tomentose, in certain lights brassy, all femora and front 

 tibife destitute of bristles; claws of front tarsi small. Wings hyaline, costal and 

 first basal cells yellowish. Length 5 mm.' 



San Diego County, Cal. A single specimen in May. 



60. A. Iiirciiia n. sp. — Black. Front and face golden-yellow, tomentose, 

 and black pilose; face very little produced below. Proboscis not projecting. 

 Antennae having the first joint one and a half times as long as the second, black 

 pilose, base of third joint short-conical. Occiput, thorax and scutellnm yel- 

 lowish white tomentose, bristles of the two latter black ; pile of dorsum of thorax 

 black, that of the front end, sides and upper part of pleura yellowish white, of 

 breast mixed black and yellowish white, of lower part of pleura and coxfe black. 

 Abdomen white tomentose, that on posterior ends of segments two to five black, 

 most extended on segments two and five; pile of dorsum very sparse, black, 

 that on the sides rather abundant, on sides of first segment and base of the 

 second white, of remaining segments mixed black and white, the black ones the 

 most numerous; venter white pilose, the tomentum black, but in certain lights 

 with a brassy tinge. Legs white and brassy-yellow tomentose, front tibiae desti- 

 tute of bristles, claws of front tarsi minute. Wings hyaline, subcostal cell 

 yellowish. Length 8 mm. 



San Diego County, Cal. A single specimen in May. 



6L A. iis:rii>piiia O. S. 



Originally described from Mexico. I have specimens from Cali- 

 fornia, Washington, Colorado and New Mexico. 



63. A. tellllt'is n. sp. — Black. Front and face yellowish white tomentose 

 and black pilose, face but slightly produced below. Proboscis not projecting. 

 Antenufe having the first joint one-half longer than the second, base of the third 



