82 BULLETIN 123, UNITED STATES NATIONAL MUSEUM. 



Conchylis hipeana Geote, Can. Ent., vol. 8, 1876, p. 207. 



Encosma ridingsana Fernald, in Dyar List N. Amer. Lepid., no. 5083, 1903. — 



Keakfott, Can. Ent., vol. 37, 1905, p. 208. — Baknes and McDunnottgh, 



Check List Lepid. Bor. Amer., no. 6894, 1917. 



A distinct species but somewhat variable both in markings and 

 genitalia. The difference in the latter are however slight and con- 

 fined to small variations in the size and shape of the cucullus of the 

 harpe. Four moths were reared by the writer August 3-4, 1915, 

 from larvae taken feeding in the roots of " greasewood ? " at Gar- 

 den of the Gods, Colorado (Hopk. U. S. no. 1219T, A. B. Champlain, 

 Coll.). They will probably be found to feed in other species of the 

 Chenopodiaceae. 



Grote's two species are at present listed as varieties. I have seen 

 no specimens answering his descriptions from eastern Canada and 

 it is very possible that his names may represent either a distinct 

 eastern species or a local race of ridingsana. For the present I am 

 retaining them in the synonomy. 



Male genitalia figured from typical specimen in the National Col- 

 lection taken at Pullman, Washington (C. V. Piper). 



Distribution according to specimens in National Collection, Ameri- 

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

 Arizona, New Mexico, California, Texas, Manitoba, Illinois. 



Alar expanse. — 18-26 mm. 



Types. — Lost ? {ridingsana) ; In British Museum ? {argentifur- 

 catana and hipeana). 



Type localities. — Colorado {ridingsana) ; Port Stanley, Ontario 

 {argeniifurcatana and hipeana). 



Food plant. — Roots of " greasewood ? " {Sarcohatus vermieu- 

 lafus ?) . 



7. EUCOSMA FERNALDANA (Grote). 

 (Fig. 209.) 



Paedisca fernaldana Gbote, N. Amer. Ent., 1880, p. 98. 



Eucosnia fernaldana Febnald, in Dyar List N. Amer. Lepid., no. 5084, 1903. — 

 Dyab, Proc. Ent. Soc. Wash., vol. 5, 1903, pp. 179, 180.— Baenes and 

 McDuNNOUGH, Check List Lepid. Bor. Amer., no. 6895, 1917. 



Extremely close to ridingsana Robinson but distinguished by the 

 reddish rather than yellow ground color. 



Male genitalia figured from typical specimen in National Col- 

 lection taken at Aweme, Manitoba (Criddle). 



Distribution according to specimens in National Collection, Ameri- 

 can Museum, and collection Barnes: Manitoba, New Mexico, Utah, 

 Colorado. 



Alar expanse. — 15-25 mm. 



Type. — ^In British Museum ? 



Type locality. — Colorado. 



Food plant. — Unknown. 



