OSTEN SACKEN ON WESTERN DIPTERA. 251 



6. Bombylttts lancifer n. sp., $ 9. — Body black, densely clothed 

 with yellow fur; tufts of brown pile in the posterior corners of the tho- 

 rax, and two tufts of black pile on each side of the abdomen connected 

 by rows of black pile over the back ; a stripe of dark brown pile between 

 the humerus and the root of the wing; on the chest, the hair is paler; 

 on the mentum, white. Epistoma yellowish-brown, shining above, 

 grayish-pollinose on the sides, beset with black pile ; frontal triangle in 

 the male grayish-pollinose, beset with black pile; the whole front and 

 vertex in the female grayish-pollinose, beset with some recumbent 

 golden-yellow totnentum and longer black piie. Proboscis long, as 

 long as the body, perhaps a little longer. Third joint of the antennae 

 moderately broad, with parallel sides, on its last third tapering toward 

 the tip. Legs red, thinly clothed with whitish scales, and beset with 

 black spines; tarsi brown, reddish at base; knees dark brown, espe- 

 cially on their anterior side. Wings blackish-brown on their basal 

 half; strongly tinged with grayish on the rest of the surface. Length 

 10 mm . 



Hal). — San Francisco, Cal. (H. Edwards); Yosemite Valley (June 9). 



One male and two females. The fur is intact in the male only; that of the 



female, which I took in Yosemite Valley, is more whitish. In general 



1 appearance, B. lancifer is not unlike B. varius of the Atlantic States ; 



J but the latter has a much shorter proboscis, a distinctly lanceolate third 



antenna! joint, black pile on the chest, wings less grayish on their distal 



: portion, etc. 



Anastcechus nov. gen. 

 Closely allied to Systcechus, but easily distinguished from the North 

 ' American species of that genus by the following characters : — 

 Head comparatively larger, and front of the female broader. 

 Face, cheeks, and lower part of the front are beset with erect pile, 

 ! which forms a dense broad brush, entirely concealing from view the 

 ! outlines of the mouth and cheeks, as well as the basal joints of the 

 i antennas. When the pile is removed, the face shows a structure en- 

 j jtirely different from that of Systcechus ; in the profile, the mouth, instead 

 ! of projecting forward, has its sides, the cheeks, on the s*aine plane with 

 the eyes, and even somewhat withdrawn behind them; the epistoma,. 

 or face above the mouth, projects ver}- little, and descends almost directly 

 below the antennae. 



Byes, in the male, separated by an interval on the vertex, which is 

 not coarctate in front of the ocelli; a distinct oblique line separates the 

 upper and larger facets from the lower and smaller ones (in Systcechus, 

 the narrow interval between the eyes on the vertex is strongly coarctate 

 in front of the ocelli; the passage between the two kinds of facets is 

 gradual and imperceptible) ; in the female, the interval between the 

 eyes is about one-half broader than the horizontal diameter of the eye. 

 1 Antewnce of the same structure as in Systcechus, but the third joint, 

 beyond the usual ring-like expansion at the extreme base, is, for a cer- 



OHB 



