LEPLDANTHEAX.— ANTHRAX. HI 



3. Lepidanthrax angulus, sp. n., s . (Tab. II. fig. 9.) 



Face and front densely clothed with golden-yellow, appressed, scaly hairs, the black ground-colour appearing on 

 the vertex only ; antenna with the basal joints red, the third joint black, subglobular, and with a long 

 style; the portion of the proboscis reaching beyond the oral margin shorter than the head; oral margin 

 reddish ; occiput with greyish, appressed, scaly hairs. Thorax with a collar-like fringe of long pale-fulvous 

 hair in front; a cross-band of whitish-grey, short, appressed tomentum between the roots of the wings, 

 broad in the middle, attenuate on the sides; a similar whitish cross-band runs from side to side across 

 the scutellum ; in the interval between these two cross-bands a short, appressed, fulvous tomentum. 

 Abdomen with an appressed, dense, fulvous tomentum, and with cross-bands of a whitish tomentum on the 

 second, third, and fifth segments, that on the second segment being the most distinct ; the lateral fringe 

 consisting of black and fulvous scaly hairs, the black ones being real cuneiform scales, a side-view 

 showing long, black, erect hairs along the edges of the segments ; the tip sometimes rufous. Legs 

 reddish, with black bristles ; tarsi darker. Halteres brown. Wings hyaline ; the root and the costal cell 

 yellowish-brown; a pale brown spot on the anterior cross-vein and on the bifurcation near it; a brown 

 cloud between this spot and the brown on the costa ; a small spot near the end of the first vein, and another 

 on the tip of the second vein; the cross-veins and bifurcations faintly clouded; the usual sinuosity 

 of the second vein, nearly above the bifurcation of the third, sometimes forming an angular indentation, 

 provided with a minute stump of a vein ; second submarginal cell unusually short, the third posterior 

 cell likewise (this is owing to the comparative shortness of the whole wing). 



Length about 7 millim. 



Five male specimens. 



Hob. Noeth Amekica, California (0. SacTcen).— Mexico, Northern Sonora (Mor- 

 rison). 



Two specimens from the same locality are only 3*5 to 4 millim. long ; they have no 

 brown spots at the tip of the first and second veins ; and the spots on some of the bifur- 

 cations and cross-veins are absent, or almost imperceptible (the wing is figured, Tab. II. 

 fig. 10). I believe these specimens to be merely a variety of L. angulus. I have a 

 specimen obtained by myself on Lone Mountain, San Francisco, June 29, 1876, which 

 is larger, but has the same coloration of the wings. 



ANTHRAX. 



Anthrax, Seopoli, Entomol. Carniol. 1763. 



The genus Anthrax, as understood after the separation of Exoprosopa and Argyra- 

 mceba, is not homogeneous ; it is merely a residue of species which could not be referred 

 to other genera. Its characters are principally negative : it differs from Exoprosopa in 

 having only two, not three, submarginal cells, and the styliform prolongation of its 

 antenna? not separated from the basal portion of the third joint by a distinct suture; 

 and from Argyramceba by its antennal style not being bisected by a suture, and the 

 tip not bearing a tuft of hairs, but only a single microscopic bristle. To this negative 

 definition may be added: the species have the eyes separated on the vertex in 

 both sexes, and that the anal cell, as far as I have observed, is always open. The 

 other characters vary in different species : the face is sometimes conically projecting, 

 sometimes only gently convex ; the antennae have the third joint in all transitions from 



