NORTH AMERICAN EUCOSMINAE. 45 



faintly interspaced with white; on costa beyond middle a fine line of 

 whitish semi-metallic scales extending transversely almost to inner 

 vertical bar of ocellus; a similar line from apical fourth of costa 

 extending nearly to top of outer vertical bar of ocellus and there 

 joining a short inwardly curved, metallic streak from costa just 

 before apex; ocellus consisting of two distinct and one very faint 

 liorizontal black lines bounded before and behind by vertical semi- 

 metallic whitish bars; cilia ochreous-fuscous heavily dusted with 

 blackish fuscous towards base. Hind wing dull dark fuscous, rather 

 coarsely scaled; cilia pale ochreous-fuscous with a dark basal band. 

 Legs very pale ochreous; tarsi faintly annulated with ochreous- 

 fuscous. 



Male genitalia of type jfigured. 



Alar expanse. — 13.6 ram. 



Type.— Cat. No. 24788, U.S.N.M. 



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

 tion Barnes. 



Type locality. — Salt Lake City, Utah. 



Food plant. — Unknown. 



Described from male type collected by C. N. Ainslie, one male 

 paratype from Alamosa, Colorado (Oslar), and three male and one 

 female paratypes from Denver, Colorado (Oslar). This species is 

 quite distinct in appearance and easily recognized by the decided 

 ochreous color of its head, thorax and fore wings coupled with its 

 dark dull fuscous hind wings. Veins 3 and 4 of the hind wing 

 are united. 



19. THIODIA DELPHINUS, new species. 

 (Fig. 134.) 



Antennae, palpi, face, head, and thorax ashy gray white. Fore 

 wing whitish tinged with ochreous making the ground color a dirty 

 yellowish white ; a few fuscous scales at middle near base outwardly 

 marking a faint and partially completed basal patch ; from middle of 

 costa a faint rather broad ochreous band extending outwardly to 

 end of cell and thence downward to dorsal margin behind the ocellar 

 patch, forming an obscure but complete angulate fascia on outer half 

 of wing; the costal edge of this fascia fuscous; a few short faint 

 scattered fuscous dashes on costa before middle; on outer half of 

 costa beyond the fascia four outwardly curved pure white geminate 

 marks, each divided by a thin fuscous line; alternating with these 

 three triangular fuscous spots, the white gemination fusing somewhat 

 below costa, giving the outer third of costa the appearance to the 

 naked eye of a narrow white strip marked with fuscous spots ; these 

 white costal geminations repeated on underside of fore wing ; extreme 

 apex, termen and area immediately above ocellar patch fuscous; 

 7806—23 i 



