184 D. w. coquillp:tt. 



bristles, claws of front tarsi minute. Wings hyaline at the apex, the base grayish 

 black, the outline of this color extending from apex to auxiliary vein, along first 

 vein nearly to base of second vein, then transversely to the last vein near its 

 apex, leaving the extreme apex of the anal cell and all of the axillary cell in 

 the hyaline part; the dark color fills discal cell to small cross- vein and fills only 

 the extreme base of the third posterior cell; cross-veins not bordered with sub- 

 hyaline, no dark spots in the hyaline portion. Length 5 — 7 mm. 



San Bernardino County, Cal. Four specimens in July. 



66. A. tantilla n. sp. — Black. Front yellowish white tomentose and short, 

 white pilose; face but slightly produced below, white tomentose. Proboscis not 

 projecting. Antennte having the first joint twice as long as the second, base of 

 third joint very short-conical. Occiput white tomentose. Thorax light yellow 

 tomentose, bristles yellowish, pile on front end, sides, pleura, breast and coxae 

 white. Scutellum mixed white and light yellow tomentose, that on the margin 

 white, bristles yellowish. Abdomen white tomentose, that on apex of each seg- 

 ment except the first, golden-yellow; pile on sides of first two segments abun- 

 dant, white, almost wanting on the remaining portion of abdomen ; venter white 

 tomentose. Legs behind white tomentose, that in front largely black and yel- 

 low, front tibiae destitute of bristles, claws of front tarsi very small. Wings 

 hyaline at apex, the base pale smoky, the outline of this color not distinct, ex- 

 tending from first vein near base of second and going nearly straight to last vein, 

 leaving the first submarginal, first and third posterior, apical fourth of the anal 

 and apical third of the axillary cell, in the hyaline part; brown does not fill 

 discal cell to small cross-vein. Length 5 mm. 



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



67. A. Tariata u. sp. — Black. Front light yellow tomentose and black 

 pilose: face but slightly produced below, light yellow tomentose. Proboscis 

 projecting half the length of the labellae beyond the oral margin. Antennae 

 having the first two joints subequal in length, the base of the third joint short- 

 conical. Occiput white tomentose, that in the middle above light yellow. Tho- 

 rax and scutellum light yellow tomentose, bristles yellow, pile of front end and 

 sides of thorax, of pleura, breast and coxae, yellowish white. Abdomen wholly 

 yellowish white tomentose, pile of sides of first two segments abundant, on rest 

 of abdomen very sparse, white; venter white tomentose and pilose. Legs white 

 tomentose, that in front largely yellow, front tibiae destitute of bristles, claws 

 of front tarsi well developed. Wings hyaline at apex, the base brown, the out- 

 line of this color extending from apex of auxiliary vein transversely to second 

 vein, then basaily a short distance, then transversely to fifth vein at middle or 

 last third of third posterior cell, then following down this vein to its apex, leav- 

 ing whole of axillary, anal and fourth posterior cells in the brown part; apex 

 of fourth posterior sometimes very pale, almost hyaline; brown fills discal cell 

 to its last sixth. Lenath 5—6 mm. 



Los Angeles and Kern Counties, Cal. Three specimens in May. 



68. A. vasta n. sp. — Black. Front and face pale yellow tomentose and short 

 black pilose; face l)ut slightly produced below. Proboscis projecting one-fourth 

 its length beyond the oral margin. Antennte having the first joint nearly 

 twice as long as the second, base of third joint elongate-conical. Occiput, thorax 



