44 LIOPTILUS. 



base of the fissure. The cilia are very pale 

 straw-colour, except at the extreme apex of the 

 underside of the first and of the upperside of 

 the second lobes, where they are greyish. 



Tlie hind wings and their fringes are very pale cine- 

 reous. 



The abdomen pale straw-colour. 



Tlie legs whitish. 



Expanse 18 millims. 



Nine specimens taken on Mount Shasta, California, 

 in August 1871, have the fore wings narrower and 

 the hind wings paler than in L. osteodactylus or 

 L. sfranmieus, their general appearance being more 

 slender ; moreover, they show no indication of a 

 costal streak : they are decidedly distinct from those 

 species. 



Lioptilus inconditus, sp. nov. 

 (Plate III. Fig. 5.) 



Ca]}ite, ])al])is et alis anticis dilutissime cinereo-albidis, 

 venis suhcmereis vix indicatis, ciliis 'paulo diluti- 

 oribus ; alis jposticis dilute cinereis. 



Ahdomine et tihiis stramineo-alMdis. 



Head and palpi very pale brownish grey, the space 

 between the antennee slightly paler ; antennee 

 pubescent, whitish, the basal joint thickened and 



