56 LIOPTILUS. 



Pore wings cleft to scarcely one third of their length, 

 with no posterior angle to the upper lobe, which 

 is rather narrow, acuminate, and depressed at 

 the apex, dusty greyish, sprinkled with fuscous 

 scales, wdiich form an elongate shade extending 

 from an ill-defined antemedian fuscous dot to 

 the base of the anterior and to the apex of the 

 posterior lobe ; a small fuscous dot lies imme- 

 diately before and slightly below the base of the 

 fissure ; there is a slight fuscous shade along the 

 posterior margin of the upper lobe, of which the 

 costal portion is rather pale ochreous ; the costa 

 itself whitish. The cilia along the apical margin 

 of both lobes are greyish, spotted along their 

 base with four or five groups of fuscous scales, of 

 which one is at the extreme apex of the upper 

 lobe. The anal angle appears to be slightly 

 more defined in the second lobe of the fore 

 wings, and the fissure rather wider at the base 

 than is usual in this genus. 



Hind wings cinereous. 



Abdomen greyish white ; the legs whitish, the first 

 tw^o pairs touched at the sides with greyish fus- 

 cous. The first pair of spurs on the hinder tibiae 

 are unequal in length ; the second pair equal to 

 the longest of the other two. 



Expanse 15 miUims. 



I met with one female only of this very dis- 

 tinct little species near Mt. Shasta, California, at 

 the end of July 1871. It differs in its palpi from the 



