OSTEN SACKEN ON WESTERN DIPTERA. 239 



D. Species resembling Anthrax halcyon Say: 



* ceyx Lw., Centur., viii, 30. — Virginia. 

 demogorgon Wk., List, ii, 265. — Florida. 



*flaviceps Lw., Centur., viii, 29. — Tatnaulipas. 



* halcyon Say, Compl. Wr., i, 252. — Northwestern United States. 

 fuliginosa Lw., Centur., viii, 31. — California. 



* alpha n. sp. — California; Cheyenne, Wyo. 



E. Species resembling Anthrax TEaMiNiPENNis Say: 



* lucifer Fab., Wied., i, 294.— West Indies ; Texas. 



SYN.—fumiflamma Walk., D. S., 184. 



* tegminipennis Say, Compl. Wr., i, 253. — Northwestern Territory, 



(Say). 

 fuscipennis Macq., H. Nat., i, 410. (Very doubtful species.) 



F. Peculiar species not coming within the former groups : 



pertusa Lw., Centur., viii, 28. — Pecos Eiver, Western Texas. 



(Wings bifasciate with brown.) 

 proboscidea Lw., Centur., viii, 27. — Sonora. (Very long proboscis.) 



Anthrax sinuosa Wiedemann, Auss. Zw., i, 301, 64.— I have speci- 

 mens of this widespread species from Sonoma County, California 

 (July 5), Vancouver Island (H. Edwards), Clear Creek Canon, Colorado 

 (P. E. Uhler), Manitou, Colo. (August 17), Morino Valley, New Mex- 

 ico (W. L. Carpenter). The Californian specimens have the short, scale- 

 like hairs covering the thorax and the abdomen of a more intense color, 

 red instead of fulvous. In all the western specimens, the brown in the 

 first posterior cell reaches the bifurcation of the third vein, sometimes 

 even beyond. The brown spot at the distal end of the first submarginal 

 cell is a little larger, so as to encroach a mere trifle on the second sub- 

 marginal. This species has small but very distinct pulvilli, and thus 

 holds the middle between Anthrax and Hemipenthes. 



Anthrax halcyon Say. — Easily distinguished by its third posterior 

 cell being in most specimens bisected by a cross- vein. It has a wide dis- 

 tribution in the Northwest and West; it is not rare round Manitou and 

 Colorado Springs, Colorado, in July and August. I also have it from 

 Morino Valley, New Mexico, July 1 (W. L. Carpenter). 



Anthrax fuliginosa Loew. — Among my specimens from the West, 

 longing to the group of A. halcyon, there are several species; three at 

 least occur in California. I am not sure whether A. fuliginosa is among 

 them. 



The following species, which seems to occur on the plains of Wyom- 

 ing as well as in the Sierra Nevada, is easily distinguishable from all 

 the described species : 



Anthrax alpha n. sp., $ $. — Coloring of the wings very like that 

 of A. halcyon; second submarginal cell bisected by a cross- vein; in the 

 third posterior, a long stump of a vein. Length 12-1 4 mm . 



Front, face, and cheeks beset, the former with short black, the two 



