64 BULIiETIlsr 123, UNITED STATES NATIONAL, MUSEUM. 



52. THIODIA INFIMBRIANA Dyar. 



(Fig. 125.) 



Thiodia artemisiana infimbriana Dyab, Proc. U. S. Nat. Mus., vol. 27, 1904, p. 



927.— Keaefott, Can. Ent., vol. 37, 1905, p. 209. 

 Eucosma artemisiana infimbriana Babnes and McDtjnnough, Check List Lepid. 



Bor. Amer., no. 7097, 1917. 



Dyar described this originally as a variety of arteimsiana Walsing- 

 liam, but it is enough different in genitalia to justify specific separa- 

 tion. The chief color differences between the two species are in the 

 cilia of the fore wings. In artemisiana they are red-brown, while in 

 inftmhriana they are olivaceous, faintly dusted with blackish fuscous. 

 Veins 3 and 4 of hind wings are united in both species. 



Male genitalia figured from cotype in National Collection (Kaslo, 

 British Columbia, H. G. Dyar, "no. 19938 "). 



Distribution according to specimens in National Collection, Amer- 

 ican Museum, and collection Barnes : Washington, British Columbia, 

 Manitoba. 



Alar expanse. — 17-19 mm. 



Type. — In National Collection. 



Type locality. — Kaslo, British Columbia. 



Food plant. — '"'' Artemesia ludovicana.^^ 



53. THIODIA OCTOPUNCTANA ( Walsingham) . 

 (Fig. 126.) 



Semasia octopunctana Wat.singham, Trans. Ent, Soc. Lond., 1895, p. 512. 

 TModia octopunctana Feenauj, in Dyar List N. Amer. Lepid., no. 5204, 1903. 

 Eucosma octopunctana Barnes and McDunnough, Check List Lepid. Bor. Amer., 

 no. 7102, 1917. 



This is a somewhat variable species. In some of the Utah speci- 

 mens the black spots in the ocelloid patch are obsolete and in all the 

 cilia of the hind wing have a dark basal band which is not found in 

 the California specimen. The genitalia vary somewhat in Utah 

 specimens but not to any significant degree and in some are identical 

 with those of the California specimen. The two forms probably 

 represent distinct races; but I have seen no specimen from the type 

 locality (Colorado) and therefore hesitate to so distinguish them. 



Male genitalia from specimen in National Collection from San 

 Bernardino Mountains, California (T. Grinnell, July 1, 1907). 



Distribution according to specimens in National Collection, Amer- 

 ican Museum, and collection Barnes : California and Utah. 



Alar expanse. — 15-18 mm. 



Type. — In British Museum. 



Type locality. — ^Larima County, Colorado. 



Food plant. — Unknown. 



