June, 1902.] KeARFOTT : On NoRTH AMERICAN ChOREUTES. 124 



Exp.). National Museum. Type No. 6266. Co-types in collec- 

 tions of Dietz and Kearfott. 



This species is very distinct from any other of this genus. The 

 wings are unusually elongate and it is the only species I have seen in 

 which the basal ground color so prominently occupies the inner half 

 of fore wings. The other half, excepting the outer margin and apex, 

 is almost uniformly overlaid with lilaceous scales ; thus the appearance 

 of the fore wings is of two colors, almost evenly divided, the inner 

 half brown and the outer half whitish. The upper surface of hind 

 wings is blackish-brown, unmarked with whitish lines or dashes, in 

 this latter respect alone it differs entirely from silphiella. But there 

 is hardly a doubt the two species could be mistaken for each other, 

 as siphiella is of various shades of light browns, yellows and ochreous, 

 whereas coloradella is dark brown or blackish and sordid. It is very 

 different in general appearance from occidejitella, the latter is well 

 marked with clearly defined and prominent white lines and bands 

 which are entirely absent in coloradella. Professor Fernald, Can. Ent. , 

 XXXII, p. 242, 1900, under heading of C. occidentella, states he has 

 " long had this species in his collection, under the nzTneoi coloradella 

 and has so named it for others. ' ' I very much regret he did not publish 

 his description, as I am well convinced the species will stand, and I 

 take pleasure in giving it the name Professor Fernald had selected. 



It can be distinguished by : ( i ) Large blackish brown basal area, 

 (2) absence of ochreous at base or thorax, and (3) blackish-brown 

 hind wings, unmarked. 



Choreutis leucobasis Fern. 



1900. Choretitis leucobasis Fernald, Can. Ent., Vol. XXXII, p. 242. 



Original description : 



" Expanse of wings 10 to 12 mm. Head, thorax and base of fore wings pure 

 white. Outer two-thirds of fore wings dark fuscous or reddish brown, with an oblique, 

 white costal streak before the apex, and two others of the same color, but much 

 smaller, on the costa between this and the white base of the wing. Outer part of the 

 wing more or less overlaid with white scales, so dense beyond the cell as to fuse and 

 form a distinct whitish patch. 



" There are numerous clusters of metallic scales scattered over the outer part of 

 the wing, some of which form a curved line around the apex on the border, and there 

 are two large clusters of them resting on a black ground between the white patch and 

 the fold. Fringes reddish brown. 



"Hind wings and upper side of abdomen fuscous. Under side of all of the 

 wings fuscous, with the white costal spots reproduced, and there are several whitish 



