180 D. w. coquillp:tt. 



14. A. aiiua Coq. 



The males of this species have tlie front densely covered with to- 

 nientuni, and the black pile is confined to the crown ; in the females 

 the tomentum of the front is sparse, not concealing the ground color, 

 and the whole front is black pilose. 



27. A. vana Coq. 



This is the mo.st variable species known to me, scarcely any two 

 specimens being marked exactly alike. The base of the third an- 

 tenual joint is elongate-conical ; tomentum of abdomen whitish, that 

 on apices of second and third segments more yellow, or sometimes 

 largely black, on apex of fourth segment black, but sometimes that 

 on apex of each segment, except the first, is largely black ; the claws 

 of the front tarsi are minute ; the second basal, anal and axillary 

 cells are sometimes almost pure hyaline ; the length of the body 

 varies from 7 — 15 mm. 



37. A. vigilaus Coq. = Anthrax edititia Say. 



The description was drawn from small specimens. 



41. A. rex O. S. — Syn. Anthrax plagosa Coq. 

 43. A. litigator Coq. 



A single specimen from Arizona has three submarginal cells in 

 each wing as in the genus Exoprosopa. 



45. A. mira Coq. 



A single specimen which I collected in Calavaras County, Cal., 

 has no trace of the black tomentose cross-band on the fourth segment 

 of the abdomen, but otherwise does not differ from the type ; it is 

 evidently only a color variety. 



50. A. alcyoil Say. 



As pointed out by Osten Sacken in the " Biologia Centrali-Ameri- 

 cana," there is no valid reason for changing this name to halcyon, 

 as Wiedemann has done. 



54. A. seleue O. S.— Syn. Anthrax otiosa Coq. 



55. A. cinefsicta n. sp. — Black, face largely pale yellow, and with a deep 

 groove in the middle, base of tibipe usually yellowish. Front in the female 

 above yellow tomentose, that below whitish, pile white; in the male densely 

 white tomentose and destitute of erect pile; face slightly produced below, 

 whitish tomentose. Proboscis never projecting more than the length of its la- 

 bellse beyond the oral margin. Antennae with the first two joints subequal in 

 length, the third elongate-conical at its base. Occiput white tomentose, that in 



