70 BULI.ETIN 123, UNITED STATES NATIONAL MUSEUM. 



Distribution according to specimens in National Collection, Amer- 

 ican Museum, and collection Barnes: Arizona, New Mexico, Cali- 

 fornia (LaPuerta). 



Alar expanse. — 11.5-15 mm. 



Type. — In British Museum. 



Type locality. — Denver, Colorado. 



Food plant. — Unknown. 



65. THIODIA UMBRATICANA, new species. 

 (Fig. 84.) 



Palpi, head and thorax dark fuscous gray sparsely dusted with 

 whitish. Palpi projecting over twice the length of the head be- 

 jT^ond it. Fore wing with termen distinctly slanting, not concave; 

 veins 3, 4, and 5 not appreciably approximate at termen; the outer 

 third and dorsal margin below fold ashy gray, obscurely dusted and 

 spotted with fuscous scales; above fold from base to end of cell a 

 patch or suffusion of fuscous shading the color of dirty bronze; on 

 outer third of costa two obscure spots of similar color; another at 

 apex; ocelloid patch not defined, indicated only by a few scattered 

 black scales; cilia fuscous gray. Hind wing smoky fuscous; cilia 

 somewhat paler with a dark basal line. 



Male genitalia of type figured. 



Alar expanse. — ^22mm. 



Type.—Q2,t. No. 24804, U.S.N.M. 



Type locality. — Golden, Colorado, 



Food plant. — ^Unknown. 



Described from a single male collected in the foot hills above 

 Golden, Colorado, March 13, 1901 (Dyar and Caudell) and bearing 

 Dyar's number, 16254. This specimen had been placed under elon- 

 gana Walsingham, which it resembles somewhat. It differs strik- 

 ingly in genitalia and is in fact close to offectalis Hulst, from which 

 it is distinguished superficially by its darker color. 



66. XmODIA OFFECTALIS (Hulst). 



(Fig. 85.) 



Crambus offectalis Hxjlst, Amer. Ent. Soc, vol. 33, 1886, p. 166. 

 Semasia oUiterana Walsingham, Trans. Ent. Soc. Lond., 1895, p. 513. 

 Thiodia offectalis Feknald, in Dyar List N. Amer. Lepid., no. 5198, 1903. 

 Thiodia obliterana Feenald, in Dyar List N. Amer. Lepid., no. 5201, 1903. 

 Eucosma offectalis Barnes and McDunnough, Check List Lepid. Bor. Amer., no. 



7095, 1917. 

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



no. 7101, 1917. 



This is an extremely variable species and very difficult to key. The 

 Arizona specimens run to a paler form than those from Colorado, 



