46 THE CANADIAN ENTOMOLOGIST. 



d 



" several oblique irregular streaks," very indefinite, but as this species is 

 stated to have a double dark brown line below the white median streak, it 

 should be readily separated. 



I have two other specimens from Verdi, Nev., which do not seem to 

 match any of the above and may be new, but await a larger series before 

 describing. 



''■- Thiodia tenuiana. Wlsm. — One specimen, Regina, VIII., 13. This 

 specimen is rather badly rubbed, but compares closely with an example 

 so named by Prof Fernald in the American Museum of Natural History. 

 It is not quite like Walsingham's figure, which, with the closely allied 

 species parvatia, Wlsm., and miniinana, Wlsm., are very poorly drawn, 

 the descriptions are also so general that an actual comparison of the types 

 will be necessary to properly separate them. Vein IV. of hind wing is 

 entirely absent in this specimen. 



Thiodia parvana, Wlsm. — Three specimens, Macleod, VI., 29, and 

 Regina, VI., 10. I have but little hesitation in placing these specimens in 

 this species; they agree with Walsingham's rather meagre description and 

 indifferent figure, except that the hind wings are most distinctly fuscous 

 rather than " very pale grayish white." Originally described from north 

 Oregon, and not recorded since. 



Thiodia reftisana, Walk. — Two specimens, Regina, VI., 18. I feel 

 certain of this identification, although both Walker and Walsingham's 

 descriptions very inadequately describe this beautiful species. It closely 

 resembles Eucosma circulana, Hbn., but can be quickly separated by the 

 ct costal fold of the latter. The Regina specimens are yellowish-brown, 

 or " cinereous-ochreous," except along the costa, which is whitish. The 

 metallic lines are a dull leaden metallic, and form an almost perfect 

 circle, involving nearly the entire outer third. Within the lower half of 

 this circle is the ocellic spot composed of a cluster of velvety-black dots 

 on a white field, and bounded outwardly on both sides and through the 

 middle (vertically) by short metallic lines. In the upper half of the circle 

 are three horizontal rows of black atoms. Between the circle and costa 

 are a number of oblique metallic lines on a paler field ; and through the 

 middle of the wing, from base to circle, about one-third below costa, is a 

 paler, nearly whitish line. The descriptions of re/usana apply much 

 better to circtilana, especially where the ground colour is stated to be 



