Ncmril AMERICAN DIPTERA. 167 



reddish, the third Joint l)lack, elrtngate-conical at its base; occiimt white tonien- 

 tose. Thorax bhiek, white tomentose, sides and front end yellowish-white pilose, 

 bristles yellowish, pleura white tomentose, pile of front part yellowish-white; 

 sciitellnm hhutk, white tomentose, bristles yellowish. Abdomen black, apex 

 partly or wholly reddish, white tomentose. that of apex of each segment except 

 the fir-st. yellowish ; sides whitish pilose, rarely a few black ones on fifth segment 

 Hiid hind part of dorsum of al)domen ; pile of sides depressed except on first 

 two segments; no silvery tomentum at tip of male abdomen ; venter reddish, 

 white tomentose and pilo,se. Legs reddish, yellowish tomentose, front tibise 

 provided with bristles; tarsi black, claws of front tarsi well developed. Wings 

 hyaline, costal cell yellowisli ; antecostal cell yellowish-white tomentose, the 

 front edge with a narrow fringe of black pile. Length 11-14 mm. 



Ctilifornia ! Eleven specimens in July. 



9. Anthrax (nlviaiia Say.— Wholly black. Front yellowi.sh tomentose 

 and black pilose ; face somewhat produced below, yellowish tomentose; proboscis 

 not jirojecting beyond epistoma; first antennal joint about twice as long as the 

 second, third joint short, conical at its base ; occiput yellowish tomentose. Tho- 

 rax mixed black and sparse yellowish tomentose, yellowish ])ilose, bristles of 

 hind angles also yellowi.sh ; breast, coxse and pleura yellowish pilose; scutellum 

 mixed black and sparse yellowish tomentose, yellowish pilo.se, hri.stles also yel- 

 lowish. Abdomen black and sparse yellowish tomentose, everywhere covered 

 with long, erect, yellowi.sh pile; venter yellowish pilose. Legs yellowish to- 

 mentose, front tibife provided with bristles, claws of front tarsi small. Wings 

 hyaline, costal cell yellowish. Length 11 mm. 



New Mexico !, Colorado, Briti.sh America, Washington Territory ! 

 Three specimens. 



Var. nigrieaiKla Loew (Syn. Anthrax niciricauda Loew).— Differs from the 

 typical fah'Uina only in having numerous black pile on the face, breast, coxa', 

 venter, dorsum of last four abdominal segments and hind margin of the last 

 segment; first basal and base of marginal cell tinged with yellowish, an indis- 

 tinct yellowish cloud on veins at bases of first submarginal and first superior 

 cells. Length 12 mm. 



Canada !, Massachusetts. Two specimens. 



10. Aiitlira.v inucorea Loew. — Difl'ers from conscssor as follows: Legs 

 usually yellowish; epistoma usually slightly produced; proboscis sometimes 

 ])rojects length of the labelhe beyond epistoma; tomentum of thorax and scutel- 

 lum usually yellowish-white, bristles of the latter yellowish ; fifth and following 

 segments of abdomen destitute of deep reddish-brown tomentum ; pile of sides 

 of abdomen long aud abundant, usually pale yellowish, that in front angles of 

 segments five and six generally black; no crossbaud of black tomentum at base 

 of fourth segment of the venter; tomentum at apex of each femur in front 

 I)lack ; antecostal cell yellowish tomentose, the front border with a fringe of 

 yellow and black pile. Length 8-10 mm. 



Nebraska !, California ! (Oct.-Nov.) Twenty-four specimens. 



The pile and tomentum of thorax and abdomen is sometimes gol- 

 den-yellow ; I took a male of this kind united in coitu with a female 

 liaving tiu" pile and tomentum of thorax and alxlomen });de yellowish. 



