1919.] NATURAL SCIENCES OF PHILADELPHIA. 181 



of two pages over Ogcodocera ( = Oncodocera 0. S., 1878) and so 

 must be used for our species. Further study of material from all 

 countries will probably result in a different nomenclature for our 

 forms. North America has Mulio leucoproda Wied. (1828), Anthrax 

 valida Wied. (1830), and Amsoiomia fasciata Will. (1901), now 

 credited to this genus. 



Genotype. — Anisotamia ruficornis Macq. (1840). [Coq. 1910]. 



EPACMUS O. S. 



I should keep this genus separated, at least subgenerically, from 

 Aphoebantus on account of the projecting face. 



Epacmus modestias Loew? 



1872. Leptochilus viodestiLS Loew, Berl. Ent. Zeit., xvi, 77. (Cent, x, 40.) 



A female from Alamogordo, New Mexico, May, (Viereck), ap- 

 parently belongs to this species, but the bristles of the hind margin 

 of mesonotum (not of postalar calli), and scutellum are black. Lower 

 part of face is polished. Pile and tomen of occiput, pleura and 

 venter, white; of mesonotum and scutellum, yellow. Scutellmii not 

 noticeably emarginated. Length, 8 mm. 



Epacmus pallid us new species. 



Similar to modestus, according to description, in having the eyes 

 contiguous, but differs in having the palpi pale and lacking the 

 black bristles or tomen on the abdomen. 



cf. Black; oral margin, palpi, halteres, part of genitalia, tibiae, 

 bases of tarsi, pale tawny. Wings clear, veins yellow. Opaque, 

 with two polished swellings on apex of scutellum. All bristles pale. 

 Pile except on ocellar tubercle, and tomen on thorax and abdomen, 

 white or slightly yellowish. A dorsal, median transverse fascia of 

 brown tomen on segments 2-5, not attaining lateral margins (absent 

 in some specimens). Genital segments not tomentose. Eyes 'con- 

 tiguous for about a distance equalling length of ocellar tubercle. 

 Third antennal joint longer than first and second together, grad- 

 ually attenuating to a rather truncate apex which bears a short 

 style. Face projecting beyond second antennal joint. Proboscis 

 projecting equal to length of antennae. Scutellum emarginated. 

 Length, 4-5 mm. 



9 . Similar but pile on frons above dark. Third antennal joint 

 more slender apically. 



Type—d"; El Paso, Texas, April 5, 1902, (Viereck & Rehn), 

 [A. N. S. P. No. 6204]. Paraiypes.—Sd', 1 9 ; topotypical. 



