100 D. W. COQUILLETT. 



thorax yellowish; bristles of thorax yellow, those of the scutellum black; to- 

 iiientum of front and face yellowish white, on the occiput white, on front end 

 of thorax extending on sides above the wings white, remaining tomentum of 

 thorax and on apical half of scutellum yellow, on base of scutellum white; to- 

 meutum on bases of second and third abdominal segments white, on base of 

 fourth and whole of fifth and sixth yellow, that on apices of second, third and 

 fourth black. Base of third antenna] joint short-conical, face much produced 

 below, proboscis not projecting beyond the epistoma. Front tibife destitute of 

 bristles, claws of front tarsi very small, pulvilli wanting. Wings grayish hya- 

 line, (!ostal, first basal and basal two-thirds of the marginal cell brown, a black 

 cloud on veins at base of each submarginal and of each posteiior cell, sometimes 

 one at base of discal cell. Length 8 mm. 



Southern California. Three specimens in July. 



Anthrax catiiliiia n. sp. — Black, the tibise and base of tarsi yellow. 

 Front and face yellow tomentose and black pilose, face retreating below. Pro- 

 boscis not projecting beyond the epistoma. Third antennal joint short-conical 

 at its base, the styliform portion slender and linear. Pile on front end of thorax 

 yellow, that on the sides, on the pleura and breast, black and yellow, i bdomen 

 somewhat abraded, black tomentum occurs on each segment; pile on sides of 

 first segment yellow, on the remaining segments largely black. Front tibise 

 provided with bristles, claws of front tarsi small, pulvilli distinct. Knob of 

 halteres black. Wings hyaline at apex, the base blackish brown, the outline of 

 this color extending from near apex of first vein transversely to second vein, 

 then basally to a point opposite apex of discal cell, then transversely to last 

 eighth or tenth of that cell, then basally to small cross-vein, then transversely 

 to fourth posterior cell slightly beyond base of the third, crossing the fourth 

 near its middle and following the penultimate vein to or near base of the fourth 

 posterior cell, then crossing to the hind margin near the middle or last fourth 

 of the axillary cell; veins at bases of the fiist submarginal, first and fourth 

 posterior cells distinctly bordered with subhyaline. Length 5-10 mm. 



Washington (O. B. Johnson) and Northern California. Four 

 specimens. 



Aiitlirax mobile n. sp.— Black, the legs brownish. Pile of head and 

 body black, that on front end of thorax mixed with white, a cluster of white 

 pile at each hind angle of thorax and another on each side of the first abdominal 

 segment: tomentum of head and body violaceous, that on the head and abdomen 

 mixed with black, on the venter black. Base of third antennal joint very short- 

 conical, the styliform portion slender and linear; face slightly produced below, 

 proboscis not projecting beyond the epistoma. Front tibise destitute of bristles, 

 claws of front tarsi small, pulvilli minute. Wings hyaline at the apex, the base 

 black, the outline of this color extending from apex of auxiliary vein trans- 

 versely to second vein, then basally nearly to base of first submarginal cell, then 

 transversely to discal cell slightly beyond the small cross-vein, then basally to 

 first fourth of the discal cell, then crossing this cell and base of fourth posterior 

 cell, then going basally along the penultimate vein to its middle, then crossing 

 the anal and axillary cells slightly before the middle of each. Length 7 mm. 



Southern California. A single specimen in May. 



