86 BULLETIN 123, UNITED STATES NATIONAL MUSEUM. 



Eucosma lolanderana Fernald, in Dyar List N. Amer. Lepid., no. 5081, 1903. — 

 Dyae, Proc. Ent. Soc. Wash., vol. 5, 1903, p. 179. — Barnes and McDun- 

 NOTTGH, Check List Lepid, Bor. Amer., no. 6881, 1917. 



Male genitalia figured from cotype in National Collection taken at 

 type locality. 



Distribution according to specimens in National Collection, Ameri- 

 can Museum and collection Barnes: California, Utah, Colorado, 

 Arizona, New Mexico. 



Alar expanse. — 17-20 mm. 



Type. — In British Museum. 



Type locality. — Mount Shasta, California. 



Food plant. — Unknown. 



18. EUCOSMA ARGENTEANA (Walsingham) . 

 (Fig. 216.) 



Paedisca argenteana Walsingham, Trans. Ent. Soc. Lond., 1895, p. 504. 

 Eucosma argenteana Fernald, in Dyar List N. Amer. Lepid., no. 5146, 1903. — 



Dyar, Proc. Ent. Soc. Wash., vol. 5, 1903, p. 179. — Barnes and McDuN- 



NOUGH, Check List Lepid. Bor. Amer., no. 6885, 1917. 



This species has veins of 3, 4 of hind wing long stalked and some- 

 times united ; some specimens exhibiting both venations on the hind 

 wings. 



Male genitalia from specimen in National Collection taken in Colo- 

 rado ("#2578"). 



Distribution according to specimens in National Collection Ameri- 

 can Museum and collection Barnes : Colorado, Montana. 



Alar expanse. — 18-20 mm. 



Typ-e. — ^In British Museum. 



Type locality. — Loveland, Colorado. 



Food plant. — Unknown. 



19. EUCOSMA IDAHOANA Kearfott. 



(Fig. 217.) 



Eucosma idahoana Kearfott, Trans. Amer. Ent. Soc, vol. 33, 1907, p. 90. — 

 Barnes and McDunnough, Check List Lepid. Bor. Amer., no. 6892, 1917. 



In pattern like argenteana Walsingham but distinguished by the 

 olivaceous ground color of the fore wings. The genitalia of the two 

 species are quite different. Appears to be known only from the type. 



Male genitalia of type figured. 



Alar expanse. — 21 mm. 



Type. — In American Museum. 



Type locality. — Blackfoot, Idaho. 



Food plant. — Unknown. 



