372 PROCEEDINGS OF THE NATIONAL MUSEUM vol.86 



antemedial line, where it meets the cell, a thirty obscure^ curved^ tlack- 

 ish line extends to upyer outer angle of cell; discal dot small, ob- 

 scure; on some specimens a few black scales outlining vein 6; on 

 termen a row of obscure blackish dots lying between the vein ends. 

 Hind wing white, with a very pale fuscous line along termen. 



Alar expanse, 22 mm. 



Genitalia (figs. 18-18c) with basal portion of anellus more nar- 

 rowly sclerotized and arms correspondingly longer than in the other 

 species of the genus ; vinculum also broader and shorter. 



Female. — Similar to the male in color and pattern except that the 

 hind wings are very faintly tinted with smoky fuscous. 



Alar expanse, 21-25 mm. 



Genitalia similar to those of longipennella., but signum somewhat 

 larger. 



Type. — In United States National Museum. 



Type locality. — La Puerta Valley, Calif. 



Food plant. — Unknown. 



Distribution. — United States: California., La Puerta Valley 

 (July) ; Arkana., Catalina Springs (May). 



Remarks. — The only specimens I have seen are those of the type 

 series in the National collection (one male and five females). The 

 species has not been reared and its larva is unknown. It is easily 

 distinguished from the other North American species of Yosemitia 

 by its paler color and the fine, curved, blackish line on the fore wing 

 from the apex of the antemedial line to the outer end of the cell. 



4. YOSEMITIA DIDACTICA Dyar 



Plates 28, 48; Figxjees 19-19c, 110-llOa 



Tosemitia didactica Dyab, Proc. U. S. Nat. Mus., vol. 47, p. 408, 1915. 



Male. — Palpi pale brownish fuscous sparsely dusted with white. 

 Head and thorax paler fuscous; tegulae shaded with blackish- 

 fuscous scales at their apices. Fore wing heavily dusted with white 

 on costal half; a short blackish line on midcosta; lower half of wing 

 concolorous with thorax; antemedial line obscure, incomplete; discal 

 dot at outer end of cell distinct, blackish ; subterminal line complete, 

 dentate, double for a short distance from apex and thence outwardly 

 margined by a narrow pale shade, obscure toward inner margin, 

 parallel to termen ; veins 5 to 9 very faintly outlined by dark scaling ; 

 terminal row of dots almost obsolete. Hind wing whitish, faintly 

 smoke-tinted, somewhat darker toward apex and along termen; cilia 

 with a pale smoky subbasal line. 



Alar expanse, 22 mm. 



