56 BULLETIN 123, UNITED STATES NATIONAL MUSEUM. 



38. THIODIA INDAGATRICANA, new species. 



(Fig. 107.) 



Palpus projecting the length of the head beyond it; white with a 

 faint grayish spot on outer side of second joint and a more or less per- 

 ceptible grayish shading towards ends of scales on underside of tuft 

 of second joint. Face and head white. Thorax white somewhat dusted 

 with ochreous or pale gray. Fore wing with termen oblique and 

 concave; veins 3, 4, and 5 closely approximate at termen; whitish 

 shaded with pale ochreous or very pale gray ; a somewhat indistinct 

 but appreciable median white longitudinal stripe extending from 

 base to top of ocelloid patch; bordering this above and below from 

 base to about middle of cell a broader shading of pale ochreous ; rest 

 of wing including dorsal margin to base suffused with very pale gray, 

 except for the upper half of the ocelloid patch and a narrow border 

 along costa at outer third and extreme costal edge to base ; these are 

 white; costa finely strigulate with fuscous from base to apex, the 

 strigulations growing stronger and longer toward apex; extreme 

 apex pale gray ; ocellus narrow containing a single rather short black- 

 ish dash and sometimes two or three black or fuscous dots; in some 

 specimens there is a line of blackish scales along fold from base to 

 middle, the line widening out somewhat towards its tip ; cilia white 

 dusted with pale gray. Hind wing with veins 3 and 4 united ; pale 

 smoky fuscous ; cilia white with a pale fuscous basal line. 



Male genitalia of type figured. 



Alar expaTise. — 14-16 mm. 



Type.— Cat. No. 24796, U.S.N.M. 



Paratypes. — In National Collection, American Museum, and col- 

 lection Barnes. 



Type locality. — Provo, Utah. 



Food plant. — Unknown. 



Described from male type, four male and three female paratypes 

 from Provo, Utah, Tom Spalding, collector (dated as follows: Type 

 and 3 males and 2 females, " VIII-26-8 " ; 1 male and 1 female, 

 " yiII-21-8 ") ; 9 male paratypes from Eureka, Utah, Tom Spald- 

 ing, collector (dated as follows: 1 male, "VIII-6-10"; 3 males, 

 "VIII-9-11"; 1 male, " VIII-10-11 " ; 1 male, " VIII-14-11 " ; 2 

 males, " VIII-15-11 " ; 1 male, " VII-17-11 ") ; 1 female paratype 

 from Glenwood Springs, Colorado (W. Barnes, August, 1892) ; 5 

 male and 1 female paratypes from Denver, Colorado (Oslar) ; and 

 1 female paratype from Elk Point, South Dakota (C. N. Ainslie, 

 Aug., 1913). 



Apparently close to both parvana Walsingham and clavana Fer- 

 nald. Distinguished from the latter by genitalia, the generally paler 

 color and its white rather than grey head; and from parvana by its 

 white head. 



