NORTH AMERICAN EUCOSMINAE. 51 



29. THIODIA ELONGANA ( Walsingham) . 



(Fig. 128.) 



Seniasia ? elongana Walsingham, Illus. Lepid. Heter. Brit. Mus., vol. 4, 1879, 



p. 56. 

 TJiiodia elongana Feenald, in Dyar List. N. Amer. Lepid., no. 5172, 1903. — 



Dyae, Proc. U. S. Nat. Mus., vol. 27, 1904, p. 927. 

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



no. 7092, 1917. 



Superficially close to the following species {transversa Walsing- 

 ham) but quite different in genitalia. The markings on fore wing 

 are also much more obscure in elongana than in transversa, \eins 

 3 and 4 of hind wing are very long stalked or united. 



Male genitalia figured from specimen in National Collection from 

 Kaslo, British Columbia (" H. G. Dyar no. 19084"). 



Distribution according to specimens in National Collection, Ameri- 

 can Museum and collection Barnes : British Columbia and Colorado. 



Alar expanse.- — 25-30 mm. 



Type. — In British Museum. 



Type locality. — Northern Oregon. 



Food plant. — Unknown. 



30. THIODIA TRANSVERSA (Walsingham). 

 (Fig. 111.) 



Semasia transversa WalsIngham, Trans. Ent. Soc. Lond., 1895, p. 514. 

 Thiodia transversa Feenald, in Dyar List N. Amer. Lepid., no. 5205, 1903. 

 Thiodia elongana transversa Dyae, Proc. U. S. Nat. Mus., vol. 27, 1904, p. 927. 

 Eucosma transversa Baenes and McDunnotjgh, Check List Lepid. Bor. Amer., 

 no. 7103, 1917. 



Is a very distinct species from elongana as shown by the genitalia. 

 It may possibly prove to be a southern race of tarandana Moschler, 

 as suggested by Walsingham, but seems distinct enough from the 

 specimens I have been able to recognize as the latter species. From 

 elongana it is chiefly separable (superficially) by the distinctly 

 defined outer fascia and the distinct basal patch reaching almost to 

 costa on fore wing. Veins 3 and 4 of hind wing are either stalked 

 or united. 



Male genitalia from specimen in National Collection from Estes 

 Park, Colorado ("H. G. Dyar, Aug., 1912"). 



Distribution according to specimens in National Collection, Ameri- 

 can Museum and collection Barnes: British Columbia (Kaslo) and 

 Colorado. 



Alar expanse. — 23-28 mm. 



Type. — In British Museum. 



Type locality. — ^Loveland, Colorado. 



Food plant. — Unknown. 



