NORTH AMERICAN DIPTERA. Ki!) 



14. Anthrax- uniist u. sp.— Wholly black. Front yellowish tonientose and 

 black or ycllowisli jiiiose; face but little produced below, yellowish tonientose: 

 prolmscis not projectin<; beyond epistoma ; third joint of antennie subfjlobular at 

 its base, the .styliform portion slender and linear, first antennal joint much less 

 robust tlian the second ; occiinit white tonientose. Thorax yellowish tonientose, 

 a stripe of white tonientuni extends from humeri to hind angles of thorax, pass- 

 ius; above and below root of each wing; bristles on hind angles of thorax red- 

 dish, the others black ; scutoUura yellowish tonientose, that at the base white ; 

 bristles black. Abdomen yellowish tonientose, that on last two segments whitish, 

 on bases of second, third and fourth segments white; sides of first two segments 

 long white pilose, sides of other segments and dorsum of last three segments 

 spar.se black pilose; venter and breast wholly black tonientose and pilose. Legs 

 yellowish toinentose, front tibiae destitute of bristles, claws of front tarsi well 

 develojied. Wings hyaline, costal and first basal cell yellowish, second basal cell 

 and ba.ses of discal and marginal cells sometimes tinged with yellowish, veins at 

 bases of first and fourth posterior cells, and sometimes the one at base of first 

 submarginal cell bordered with brown. Length 4-7 mm. 



California! Twelve specimens. 



15. Anthrax snpina n. sp. — Differs from anna as follows: Tomentum of 

 face white; second joint of antennpe not noticeably more robust than the first; 

 base of third joint short conical. Thorax mixed yellow and black tonientose. 

 the front end, sides and pleura white pilose, bristles of thorax mostly reddish ; 

 no white tomentum at base of scutellum ; tomentum of abdomen yellowish, that 

 on second segment white, on apices of third, fourth and extreme apex of fifth 

 segment black ; tomentum of first two segments of venter and pile of front end 

 of breast white; tomentum of legs black, claws of front tarsi small; veins at 

 bases of first submarginal and fourth posterior cells never bordered with brown. 

 Length 7 mm. 



California I Two specimens. 



l(i. Anthrax ino|>!« n. sp. (Syn.fA. costataSujl) — Same as njuia, except face 

 largely black ; occiput pale yellowish tonientose. Thorax destitute of stripes of 

 white tomentum, bristles of hind angles black. Abdomen wliite tomento.se, base 

 of third segment and apices of the fifth and sixth yellowish tonientose, apices 

 of second and third segments and bases of the fifth and sixth black tonientose; 

 sides of the first four segments abundant whitish pilose, of the other segments 

 sparse black pilose. Legs wholly black tonientose, front tibiiB provided with 

 bristles, claws of front tarsi small ; hind legs fringed above and below with long 

 flattened scales; base of marginal cell and second basal cell, except its front 

 margin, brown. Length 8 mm. 



California ! A single male specimen (Williston). 



17. .Anthra.x ondora n. sp. — Black, first antennal joint and the legs red- 

 dish. Front white or yellowish tomentose and black or yellowish pilose ; face 

 slightly projecting below, yellowish tomentose, that in the middle above some- 

 times white ; proboscis not projecting beyond epistoma; first joint of antenms 

 about twice as long as the second, the third joint subglobular or .short conical at 

 its base; occiput white toinentose, that in the centre yellowish. Thorax yel- 

 lowish tomentose, a crossband of white tomentum near its front edge extending 



TR.^^NS. AMEK. ENT. SOC. XIV. (-22) OCTOBEK, 18537. 



