94 Cincinnati Society of Natural History. 



This golden patch, while it does not constitute a definitely 

 limited marking, is nevertheless distinctly differentiated from 

 the rest of the wing. A straight shining silvery or pale golden 

 fascia crosses the wing at three-fifths its length. Cilia of the 

 general hue, the tips but little paler around the apex. Hind 

 wings and cilia gray. 



Legs black, except the tibiae and tarsi of the middle pair, 

 which are silvery. Abdomen blackish above, somewhat paler 

 beneath. 



Expanse : 3.5 mm. 



Eight specimens of this species were bred from much con- 

 torted serpentine mines on the upper side of leaves of poison 

 ivy, Rhus radicans L., at Cincinnati. The loosened epidermis 

 is pale brownish yellow and the frass is 

 dispersed, in most places, throughout the 

 entire breadth of the mine. The cocoon is 

 reddish ocherous, not much flattened and 

 is a little broader at its anterior end. 

 Similar mines occur on species oi sumac 

 (Rhus spp.), which will doubtless produce moths of this 

 species. Chambers (Psyche, III, QQ, 1880) briefly mentions 

 such mines on sumac. 



This species is very distinct from any other described 

 species. Its striking characteristics are the black head, purple 

 base of the costa and the golden patch of scales, the last stand- 

 ing out even to the naked eye as paler and more lustrous than 

 the remainder of the wing. 

 Types in my collection. 



Nepticula villosella Clemens. 



Nepticula villosella Clemens, Proc. Ent. Soc. Phil., I, 84, 

 1861 ; Tin. No. Am., 174, 1872 ; Dyar, List N. A. Lep., No. 

 6224, 1902. 



Syn. daUasiana Prey and Boll, Stett. ent. Zeit., XXXVII, 

 228, 1876; Dyar, List N. A. Lep., No. 6195, 1902. 



14 



