179 



COSSIDAE 



Genus Heterocoma gen. nov. (type H. albistriga sp. nov.). 



Palpi minute, upturned, hairy; $ antennae bipectinate, 9 serrate; thorax 

 and abdomen clothed with long hair; proboscis absent; hind-tibiae with two 

 pairs of well-developed spurs ; venation much as in Comadia but without the 

 cellula inirusa on both wings; veins 6 and 7 of secondaries well stalked. 



H. ALBISTRIGA sp. nov. (PI. XX, Figs. 16, 17). 



Thorax light silvery gray, mesothorax crossed by a curved black line and 

 tipped posteriorly with black; abdomen smoky, paler laterally and on anal seg- 

 ment; primaries light gray, non-striate, costa white with numerous small dark 

 strigae; vein 1 streaked with white to subterminal area; an outwardly oblique 

 white streak at end of cell extending a short distance along vein 3 ; a faint white 

 incomplete s. t. line parallel to outer margin ; near base of wing between cubital 

 vein and vein 1 two short ochreous upright dashes; an incomplete and indis- 

 tinct ochreous band at end of cell crossing the white streak and ending at 

 vein 1 ; fringes concolorous, paler outwardly. Secondaries deep smoky. Be- 

 neath smoky, costa paler with dark dashes; fringes whitish outwardly. 



5 . Generally whitish with obsolescent maculation. Expanse 30 mm. 

 Habitat : Paradise, Cochise Co., Arizona. 2 $ 1 $ . Types, Coll. 

 Barnes. 



