88 BULLETIN 123, UNITED STATES NATIONAL MUSEUM. 



Distribution according to specimens in National Collection, Ameri- 

 can Museum, and collection Barnes: Washington, Montana, New 

 Mexico, Iowa. 



Alar expanse. — 16-20 mm. 



Type. — In British Museum. 



Type locality. — Loveland, Colorado. 



Food plant. — Unknown. 



22. EUCOSMA HEATHIANA Kearfott. 



(Fig. 235.) 



Eucosma Jieathiana Keakfott, Can. Ent., vol. 39, 1907, p. 56. — Barnes and 

 McDuffiNOUGH, Check List Lepid. Bor. Amer., no. 6930, 1917. 



Male genitalia figured from cotype in National Collection from 

 Washington County, Arkansas. 



Distribution according to specimens in National Collection, Ameri- 

 can Museum, and collection Barnes: Manitoba, Arkansas, South 

 Dakota, Iowa, Kansas, New Mexico. 



Alar expanse. — 14-18.5 mm. 



Type. — In American Museum. 



Type locality. — Cartwright, Manitoba. 



Food plant. — Unlmown. 



23. EUCOSMA ARGENTIALBANA ( Walsingham) . 

 (Fig. 234.) 



Paedisca argentialbana Walsingham, Ulus. Lepid. Heter. Brit. Mus., vol. 4, 



1879, p. 44. 

 Paedisca smithiana Walsingham, Trans. Ent. Soc. Lond., 1895, p. 506. 

 Eucosma argentialbana Fernald, in Dyar List N. Amer. Lepid., no. 5089, 1903. — 



Kearfott, Can. Ent., vol. 37, 1905, p. 44. — Barnes and McDunnough, 



Check List Lepid. Bor. Amer., no. 6918, 1917. 

 Eucosma smithiana Fernald, in Dyar List N. Amer. Lepid., no. 5162, 1903. — 



Kearfott, Can. Ent., vol. 37, 1905, p. 44. — Barki:s and McDunnough, 



Check List Lepid. Bor. Amer., no. 7047, 1917. 



My conception of this species agrees with Kearfott's, except that I 

 would include smithiana Walsingham as a synonym, as there is 

 nothing in the description of the two species on which to separate 

 them. The specimens in the American Museum determined by Kear- 

 fott as smithiana are Thiodias and obviously not Walsingham's 

 species. 



I have seen no specimens from the type locality of argentialbana 

 (Texas) but specimens from Colorado, New Mexico, Utah and Man- 

 itoba agreeing . with the descriptions of both argentialbana and 

 smithiana agree on all genitalia characters. In the National Collec- 

 tion there is also a series of specimens from Sioux City, Iowa (" IX, 



