NORTH AMERICAN EUCOSMINAE. 265 



white, rather evenly dusted with dark gray. Hind wing with veins 

 3 and 4 united ; dark smoky fuscous ; cilia paler with dark basal and 

 broad dark median bands. 



Eight harpe of genitalia figured. 



Alar expanse. — 15-17 mm. 



Type. — In collection Barnes. 



Paratype. — Cat. No. 25615 U.S.N.M. Also in American Museum. 



Type locality. — Goldstream, British Columbia. 



Food plant. — Unknown. 



Described from male type and two female paratypes from the type 

 locality, labeled " 10-5-03." In the key the species runs to misturana 

 but will be at once distinguished by the cilia pattern of the fore 

 wing. 



THIODIA MODICELLANA, new species. 

 (Fig. 424.) 



This species reminds one of both palUdarcis Heinrich and rmni- 

 onana Walsingham, but is whiter and less distinctly marked than 

 either. 



Palpi, face, head, and thorax snow white. Fore wing pure white 

 with a faint ochreous-white subcostal shading which spreads out 

 over the wing toward termen and which, with a similar subdorsal 

 shading, defines a very obscure median longitudinal white streak; 

 costal markings nearly obsolete; one or two small black dots above 

 tornus ; cilia white, dusted beyond base with grayish fuscous. Hind 

 wing smoky white; cilia white without basal band; veins 3 and 4 

 stalked. 



Harpe of male genitalia of type figured. 



AlaT expanse.- — 11.5 mm. 



Type. — In Canadian National Collection. 



Paratype.— Csit. No. 25616, U.S.N.M. 



Type locality. — Aweme, Manitoba. 



Food plant. — Unknown. 



Described from male type and one male paratype, both from the 

 type locality (Norman Criddle, collector), and dated, respectively, 

 " 2-VII-1921 " and '■ 14-VII-1921." A good species but easily con- 

 fused with several others. Can be most readily distinguished by the 

 shape of its harpes. 



THIODIA FESTIVANA, new species. 

 (Fig. 425.) 



Like octopunctana Walsingham, but darker and with different 

 ocelloid patch. 



Palpi, face, head, and thorax white, somewhat dusted with ashy 

 gray. Fore wing white with a yellow-brown basal patch and outer 



