218 BULLETIN 133, UNITED STATES NATI02>rAL MUSEUM. 



Alar expanse. — 10-13 mm. 



Type.—C2it. No. 24848, U.S.N.M. 



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

 lection Barnes. 



Type locality — Rosslyn, Virginia. 



Food plant. — Heuchera americana. 



Described from male type, seven male and two female paratypes 

 all reared from larvae mining the leaves of our eastern " alum root " 

 (Hopk. U. S. no. 13981, Heinrich, collector). 



The habits of the larvae are similar to those of the western 

 ruidosana except that they make a digitate rather than a blotch mine 

 (very similar in fact to the mines made by the larvae of the genus 

 Parectopa) . 



They are found fairly abundant in the damp shady spots on the 

 hillsides along the Potomac near Washington, District of Columbia. 

 The larvae were collected in October, 1916, and moths issued during 

 late May and early June of the following year. When full fed, the 

 larvae is a deep uniform red with jet black head and thoracic shield. 



The species is close to ruidosana, which it replaces in the East ; but 

 is quite distinct and easily recognizable. 



37. EPINOTIA EMARGINANA (Walsingham) . 



(Fig. 330.) 



Proteopteryx emarginana Walsingham, Illus. Lepid. Heter. Brit. Mus., vol. 4, 

 1879, p. 68 ; Trans. Ent. Soc. Lond., 1884, p. 144.— Feknald, in Dyar List N. 

 Amer. Lepid., no. 5210, 1903 ; Can. Ent., vol. 36, 1904, p. 120.— Barnes and 

 McDuNNOUGH, Clieck List Lepid. Bor. Amer., no. 7113, 1917. 



This and the following two species would constitute the genus Pro- 

 teopteryx could that group be validlj^ separated from Epinotia. It 

 has only one character to distinguish it, namely, the deeply notched 

 termen of fore wing and without some other character either in larval 

 or genitalic structure I would not feel justified in maintaining it. 



The three species are quite easily separated on genitalia but in pat- 

 tern are hardly to be distinguished. Both emarginana and crenand 

 are extremely variable and many of their varieties have so much the 

 same appearance that without an examination of their genitalia it is 

 practically impossible to determine which is which. Dyar's cerco- 

 carpana is if anything the most distinct; but it too, aside from its 

 genitalia, has no key character. 



Male genitalia figured from specimen in National Collection from 

 Santa Catalina Mountains, Arizona (reared under Hopk. U. S. no. 

 12129c from Quercus agrifolia, May 28, 1914, M. Chrisman). 



Distribution according to specimens in National Collection, Amer- 

 ican Museum, and collection Barnes: Arizona, California, Oregon, 

 Washington. British Columbia. 



