PLATYPTILUS. 11 



which are otherwise white except at the anal 

 angle. 



Hind wings brown, with unicolorous brown cilia, 

 those on the dorsal margin of the third lobe only 

 being slightly paler at their base. 



The third pair of legs suffused with ashy fuscous; 

 the spurs and feet only slightly paler. 



Expanse 24 millims. 



Twelve specimens taken on the banks of Kouge 

 River, in Southern Oregon, May 7th, 1872, others 

 having been met with in Lake County, California, 

 June 18th, 1871. 



This species differs from the following, P. ortho- 

 car 'pi , in its whiter head, in the unicolorous brown 

 fringes of the lobes of the hind wings, and in the 

 cinereous hind legs, which have not the same con- 

 spicuous white annulations beneath the joints as in 

 that species ; moreover, the triangular costal patch is 

 straighter at its outer margin (i. e. less produced out- 

 wards) ; the apex and the ground-colour of the fore 

 wings bluish white 



Platyptilus orthocarpi, sp. nov. 



(PLATE I. FIG. 9.) 



Capite subochraceo. 



Alis anticis subochraceo-cinereis, macula triangulari 

 costali et margine apicali fusci-s, costa fusco 



