NORTH AMERICAN EUCOSMINAE. 63 



paratypes from Deer Creek, Provo Canyon, Utah, all collected by 

 Tom Spalding (July-August), selected out of a series of over fifty 

 specimens from Doctor Barnes collection ; and eight male paratypes 

 from Stockton, Utah (Tom Spalding), out of the Kearfott collec- 

 tion, 



A distinct and easily recognized species, at once distinguished by 

 its genitalia and the light ochreous salmon colored and practically 

 unmarked fore wing. 



50. THIODIA PALLmiCOSTANA (Walsingham) . 



(Fig. 82.) 



Semasia palUdicostana Walsingham, Illus. Lepid. Heter. Bi'it. Mus., vol. 4, 



1879, p. 62. 

 Thiodia palUdicostana Febnald, in Dyar List N. Amer. Lepid., no. 5180, 1903. — 



Keabfott, Can. Ent., vol. 37, 1905, p. 209. 

 Eucosma palUdicostana Baenes and McDunnough, Check List Lepid. Bor. 



Amer., no. 7068, 1917. 



Male genitalia figured from specimen in National Collection from 

 Cartwright, Manitoba (E. F. Heath). 



Specimens in National Collection and American Museum from 

 Manitoba. 



Veins 3 and 4 of hind wing stalked. 



Alar expanse. — 16-18 mm. 



Type. — In British Museum. 



Type locality. — " Sonoma and Lake Counties, California." 



Food plant. — Unknown. 



51. THIODIA ARTEMISIANA (Wabingham). 



(Fig. 127.) 



Semasia artemisiana Walsingham, Illus. Lepid. Heter. Brit. Mus., vol. 4, 1879, 



p. 56. 

 Thiodia artemdsimia Fernald, in Dyar List N. Amer. Lepid., no. 5174, 1903. 

 Eucosma artemisiana Baenes and McDunnough, Check List Lepid. Bor. Amer., 



no. 7097, 1917. 



Male genitalia from specimen in National Collection from Pull- 

 man, Washington (" 19 Aug. 98," C. V. Piper). 



Distribution according to specimens in National Collection, Amer- 

 ican Museum, and collection Barnes : Washington and California. 



Veins 3 and 4 of hind wing united. 



Alar expanse. — 20-22 mm. 



Type. — In British Museum. 



Type locality. — Mount Shasta, California. 



Food plant. — ^Artemisia. 



