60 BULLETIN" 123, UNITED STATES NATIONAL MUSEUM. 



45. THIODIA PALLIDARCIS, new species. 



(Fig. 97.) 



Palpi projecting about one and one-half times the length of the 

 head beyond it ; white somewhat dusted with gray on the outer sides. 

 Face and head snow white. Thorax white very faintly dusted with 

 pale ochreous on the sides. Ground color of fore wing white largely 

 obscured by pale ochreous-f uscous ; the white ground color chiefly 

 indicated as a median horizontal streak {above the fold) extending 

 from base to end of cell and somewhat attentuated at its apex, a 

 white margin along basal half of costa, six outwardly curved, narrow, 

 rather long white dashes on outer half of costa and a more or less 

 distinct white shading along dorsal margin below the fold ; the white 

 costal geminations are interspaced with pale fuscous streaks ; ocellus 

 indicated only by the obscure semi-metallic inner and outer bars and 

 two or three black scales; cilia white faintly dusted with blackish 

 fuscous scales. Hind wing with veins 3 and 4 long stalked; very 

 pale smoky fuscous ; cilia white. 



Male genitalia of type figured. 



Alar expanse. — 13-14 mm. 



Type. — In American Museum. 



Paratypes. — Cat. No. 24799, U.S.N.M., also in American Museum 

 and collection Barnes. 



Type locality. — San Diego, California. 



Food plant. — Artemisia calif omica. 



Among Kearfott's duplicates in the American Museum, I found 

 four specimens (three males and one female) from San Diego, Cali- 

 fornia (W. S. Wright, Collector) dated as follows: 2 males, 

 "V-10^08"; 1 male, and 1 female, "VI-9-08" These had been 

 designated by Kearfott as cotypes of a new species with the name 

 " Thiodia poUidarcis.^'' The description and name, however, were 

 never published. I have, therefore, adopted the Kearfott manu- 

 script name and make one male the type and the other three speci- 

 mens paratypes. Six additional male paratypes are also included 

 from a series out of Doctor Barnes' collection also from San Diego, 

 California. A female in the National Collection from Los Angeles 

 County, California, and labeled in Koebel's handwriting, " from 

 larva in Artemisia calif omica., no. 180 " is also included as a para- 

 type. 



The species very closely resembles indagatricana Heinrich but 

 differs in genitalia. It also has fore wings somewhat broader in 

 proportion to their length and there is no indication of the dark 

 scaling on the fold normally to be found in indagatricana. 



