NORTH AMERICAlSr EUCOSMINAE. 59 



Faratypes. — Cat. No. 24Y97, U.S.N.M., also in American Museum 

 and collection Barnes. 



Type locality. — Shasta Retreat, Siskiyou County, California. 



Food plant. — Unknown. 



Described from male type and five female paratypes from Dr. 

 Barnes' material all collected at Shasta Retreat and dated as follows : 

 type, "July 16-22"; 3 paratypes, "June 16-23," two paratypes, 

 " June 24-30." 



This form so closely resembles striatana that I hesitate to describe 

 it as anything but a Pacific coast race of striatana. The differences 

 in shape and size of the harpes of the genitalia would however 

 suggest two distinct species. 



44. THIODIA DELPHINOIDES, new species. 



(Fig. 135.) 



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

 tuft on second joint shading to gray beneath; also a round grayish 

 spot on outer side of second joint. Head and thorax white. Fore 

 wing faintly dusted with pale gray giving the insect a pearly grayish 

 white appearance to the naked eye; the snow white ground color 

 chiefly distinguished on outer third of costa, in the narrow ocelloid 

 patch and in a faint median streak from base to end of cell ; on costa 

 just before apex the white forms a rather conspicuous triangular 

 spot ; in ocellus one or two short black dashes faintly indicated ; costa 

 marked with short fuscous dashes, the latter more appreciable on 

 outer half of wing; cilia white faintly dusted with grayish fuscous. 

 Hind wing with veins 3 and 4 stalked ; very pale smoky gray shading 

 to fuscous at apex and termen ; cilia white with a pale fuscous basal 

 line and a more or less extended, paler fuscous median shading. 

 Anal tuft stout, white. Male genitalia similar to those of delphinus 

 Heinrich but with neck of harpe more slender and costal angle of 

 cucuUus differently produced. 



Male genitalia of type figured. 



Alar expanse. — 12.5-16.5 mm. 



Type.~C2it. No. 24Y98, U.S.N.M. 



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

 tion Barnes. 



Type locality. — Eureka, Utah. 



Food plant. — Unknown. 



Described from a large series in the National Collection and 

 Barnes' collection all from Eureka, Utah, collected by Tom Spald- 

 ing and bearing various August dates. Of these I have selected one 

 male as type and thirty male paratypes. 



