2 PEOCEEDIXGS OF THE NATIONAL MUSEUM vol. 75 



THIODIA INSIGNATA Heinrich 



Figure 1 

 Thiodia insignata Heinrich, Journ. Washington Acad. Sci., vol. 1-4, Xo. 16, 

 1924, p. 386. 



Male genitalia figured from type. 



THIODIA LATENS, new species 



Figure 2 



A pale, sordid grayish fuscous species hardly distinguishable from 

 delpMnus Heinrich except by genitalia. 



Palpus, face, head, and thorax ashy grayish white. Fore wing 

 ocherous white, dusted with fuscous, making the general color a pale, 

 sordid fuscous; no distinct maculations except four pairs of white 

 dashes on outer half of costa and an ocelloid patch consisting of a 

 white spot containing one or two short black dashes or dots between 

 two very obscure vertical pale bars, cilia fuscous, peppered with 

 black and white (the scale ends white) ; termen slanting and slightly 

 concave; veins 3, 4, and 5 approximate at termen. Hind wing 

 concolorous with fore wing; cilia concolorous, with a slightly darker 

 basal band; veins 3 and 4 united. 



Alar expanse. — 15 mm. 



Type. — In collection Barnes. 



Paratypes. — Cat. No. 41199, U.S.N.M., also in American Museum 

 and collection Barnes. 



Type locality. — Monachee Meadows, Tulare County, Calif. (8,000 

 feet). 



Food plant. — Unknown. 



Described from male type and seven male paratypes, all from the 

 type locality ("July 8-14"). 



A distinct species easily distinguished by its genitaUa, but in pat- 

 tern and color very like delphinus. Specimens of the latter from its 

 type locality have a paler ground color and a dark patch on base of 

 fore wing which is lacking in latens. These characters, however, will 

 not always serve, for in a series of delpMnus before me (also from 

 Monachee Aleadows) the maculations are very obscure, the ground 

 color darker, and the moths not to be distinguished from typical latens 

 except by their genitalia (the genitalia and their tuf tings making 

 the end of the male abdomen considerably larger in delphinus). 



TKIODIA LEPIDANA (Walsingham) 



Figure 7 



Three specimens of this species collected by George V. Copley at 

 Chilcotin, British Columbia ("15-IX-1925"), have been received 

 from E. H. Blackmore. Two of these are now in his collection and 

 one (a male) is in the United States National Museum. In both 



