196 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 90 



narrow, pale ochreous fascia; from middle of costa, around termen 

 to inner margin, a series of pronounced black spots; cilia pale 

 ochreous strongly infuscated. Hind wing yellowish fuscous, darker 

 apically and with a narrow, blackish-fuscous line before cilia; cilia 

 whitish ochreous, banded with fuscous. Legs pale ochreous suffused 

 and mottled with blackish fuscous except at joints. Abdomen ochreous 

 suffused with fuscous above and with a blackish-fuscous line on each 

 side beneath. 



Male genitalia. — Harpe without process from base of sacculus or 

 costa; moderately clothed with long hairs; cucuUus bluntly pointed; 

 clasper broad, less than half the width of harpe, flattened, extending be- 

 yond ventral margin and terminating in one long and one short point ; 

 sacculus short, narrowly folded. Anellus a sclerotized plate abruptly 

 constricted posteriorly; posterior edge concave; anterior and lateral 

 edges convex, the former more than the latter; posterior edge pro- 

 duced laterally. Vinculum rounded. Transtilla a diamond-shaped 

 sclerotized plate with slightly developed hairy lobes. Aedeagus short, 

 stout, with a twist ; vesica armed with many small spinules. Tegumen 

 and socii distinctly rounded, sparsely clothed with hairs. 



Female genitalia. — Genital plate broad, moderately sclerotized ex- 

 cept around the ostium where it is nearly membranous; the portion 

 of the plate surrounding the ostium is raised and roughly triangular 

 in shape (apex posteriorly). Ostium broadly oval. Ductus bursae 

 a long membranous spiral ; inception of ductus seminalis well before 

 ostium. Bursa copulatrix large with well-developed signum. 



Alar expanse, 20-23 mm. 



Type. — In United States National Museum. 



Type locality. — "Pennsylvania." 



Food plant. — Betula (sp. ?) ; Ostrya virginiana (Mill.) Koch. 



Distribution. — Northeastern United States and eastern Canada. 



United States records 



Connecticut: East River, 2 S 3 ( 14-VII-14 ; 2-VIII-lO, Chas. R. Ely). 

 District of Columbia: $ ("ll-VI-'84"). 



New Jersey: Greenwood Lake, 2 $ 9 (26-VI, W. D. Kearfott). 

 Pennsylvania: New Brighton, 13 $ $, 8 5 2 (July to September dates, H. D. 

 Merrick). 



Canadian records 



Ontario: Biscotasing (August 16, 1931, K. Schedl) ; Bobcaygeon (July 5, 1932, 

 J. McDunnough) ; Ottawa (July 19-30, 1905 and 1906, C. H. Young). 



Quebec: Meach Lake (July 23, 1933, C. H. Young) ; Otter Lake (August 6, 1931, 

 G. S. Walley). 



Remarks. — This species is close to grotella and maculatella but is 

 amply distinct in genitalia (both male and female) and lacks the black 

 discal dash so prominent in both the other species. 



