86 THE CANADIAN ENTOMOLOGIST. 



C. sororculella, n. sp. 



Generally similar to bjerkandella, Thunb., but without any traces of 

 the yellow dashes at the base of fore wings. The pale gray space in the 

 middle of the wing is sharply limited without and within by a paler line ; 

 in the centre of this space is a large group of black and metallic scales ; 

 beyond the pale line are no black scales, but a regular, distinct, 

 subterminal metallic line ; a subcostal metallic streak in basal space. 

 Hind wings with a white dash as in onustaiia. Two examples. Placer 

 Co., California. June (A. Koebele) ; U. S. Nat. Mus., type No. 4426. 

 C. occidentella, n. sp. 



Grayish brown ; basal half of wing of this colour, with a curved white 

 line across rts centre. Terminal half of wing filled, except somewhat 

 narrowly along outer margin, by a large whitish patch, irrorate with 

 brown scales, containing above a small black patch and below a large 

 quadrate one, cut by a whitish line transversely ; silvery scales along 

 costa basally, middle of wing, subterminally and in the black patch. 

 Hind wings brown, immaculate. Below a faint, irregular, whitish, sub- 

 marginal line on hind wings and two costal dots on fore wings. Expanse 

 14 mm. One male. California (coll. Beutenmiiller). U. S. Nat. Mus., 

 type No. 4428. 

 C. extrincicella, n. sp. 



Light brown, head and palpi whitish. Fore wing with basal half 



brown, crossed by a broad, straight, white line with a it'N silvery scales 



outwardly on costa. Terminal half of the wing nearly white except 



narrowly along outer margin, streaked above with longitudinal, somewhat 



cuneate, lines of black scales, below containing a single elongate, rounded, 



black patch with two groups of silvery scales ; similar scales on outer 



border of white patch ; outer half of fringe white. Hind wings pale 



brown. Expanse 12 mm. One male. Wisconsin. U. S. Nat. Mus., type 



No. 4427. 



Genus Thelethia, Dyar. 



Dyar, Can. Ent., XXV., 301, 1893 ; TJiia, Hy. Edw. (preoc. Col. 

 1840) ; Hy. Edw., Ent. Am., HI., 181, 1888 ; Kirby, Cat. Lep. Het., I., 

 901, 1892. 



T. extranea, Hy. Edw., Ent. Amer., HI., 181, 1888 ; Smith, List. 

 Lep. Bor. Am., No. 956, 1891 ; Dyar, Can. Ent., XXV., 301, 1893. 



I include this genus here tentatively. I have not seen a specimen in 

 six years, and my old notes give only the venation. It may be a Tineid 

 near Incurvaria. 



