PLATYPTILUS. 5 



Counties, California, June 1st to 18th, 1871, and on 

 the Siskiyou Mountains, June 8th, 1872. 



Some varieties, also from California and Oregon, 

 are decidedly paler than the figure, indeed so much 

 so as to suggest the idea that they may possibly be 

 distinct ; but I have an equally pale specimen bred 

 from a larva found in England. 



Platyptilus adustus, sp. nov. 



(PLATE I. FIG. 4.) 



Capite, palpis et alls anticis aduste cervinis, parum 

 partim sublituratis^ costa vix infuscata, lineola ad 

 bases ciliorum marginis apicalis brunnea. 



Alis posticis bnmneis, digito tertio paulo pallidiore. 



Head, face, palpi, and antennae, together with the 

 projecting frontal tuft, fawn-colour, with a 

 browned or burnt appearance. 



The anterior wings the same, but with very faint 

 indications of paler blotches about the dorsal 

 margin and above the fissure. The costa is of 

 a slightly darker shade, and a slender brownish 

 line runs along the base of the cilia on the 

 apical margin ; the cilia are scarcely paler than 

 the fore wings. 



Hind wings with the two anterior lobes more brown- 

 ish ; the posterior lobe of the same colour as the 

 fore wings. 



Legs pale fawn-colour ; the feet and anterior portions 

 of the tibiae scarcely paler. 



Expanse 23 millims. 



