456 WILLIAM T. M. FORBES 



shaded with pale pinkish gray. Hind wing fuscous gray. 13 mm. (O. dimidiana, 

 auct., not Sodofsky). 



May, July, and August. Larva on rose and blackberry. 



Hampton, New Hampshire, to Missouri and Arkansas. New York: Ithaca, Big 

 Indian Valley. 



28. 0. montanana Kearfott. Similar to 0. nimbatwiM, the outer boundary of 

 the dark base erect, nearly straight, and somewhat diffuse. Pale portion duller 

 and more clay colored. 



Ithaca, New York; North Carolina. 



29. 0. duplex Walsingham. Base light gray, striate with blackish; the outer 

 Itoundary oblique on costal two-thirds, sharply bent in on A and out again to 

 the inner margin. Antemodial area white, a large mottled blackish patch resting 

 on inner margin from middle almost to anal angle, more or less divided by irregu- 

 lar whitish marks, a more or less distinct gray or blackish fascia extending from 

 the upper side of the patch obliquely to the middle of the co'sta. Outer part of 

 wing white, the apical region shaded with gray and sometimes some brown, 

 usually leaving the costa, except at extreme apex, and a band extending to anal 

 angle, white; more rarely, with only the costa white, and the dorsal region strigosc 

 or suffused with gray or brown. Hind wing light gray. 18-27 mm. 



June and July. Larva a leaf roller on poplar, forming a roll very much like 

 that of Anacampsis innocuella. 



New York to Pennsylvania, and west to California. New York: Peru, llion. 

 Portage, Ithaca. 



This species is intermediate between the nimbatana and bipartita-tia groups and 

 is possibly nearer the latter, with which it is almost always confused in collections. 



30. 0. albeolana Zeller. White, marked with dark gray. An oblique bar on 

 costa at a fourth way from base; a much larger rounded patch at middle of costa: 

 a gray shade along inner margin to middle, defined by a black dash in base of 

 fold, but outwardly diffuse or breaking up into striae; a black dot at lower angle 

 of cell, and some lighter -gray shading on outer third of wing. Hind wing brownish 

 gray. 18 mm. (Jiartmanniana auct., not uiniueus. ) 



June and July. Larva a leaf roller on white birch. 



Maine to New Jersey. New York: Big Indian Valley, Karner, New Windsor. 



31. 0. roaeomaculana Herrich-Schseffer. Fore wing deep blue-gray, mottled with 

 black, with an irregular pink fascia of moderate breadth from third quarter of 

 costal margin to outer margin at anal angle, sometimes broken into costal and 

 anal patches by a gray shade. Hind wing mouse gray. 15 mm. 



Larva on Pyrola. 

 Europe; Labrador. 



32. 0. costimaculana Fernald. Blackish, shaded with blue.-gray and whitish. 

 Base, and especially second fourth of costa, strongly dusted with whitish ; a 

 large square white patch on costa at two-thirds way out and some white striae at 

 anal angle. Hind wing gray. 11-14 mm. 



Maine; Massachusetts: Manitoba. 



33. 0. chionosema Zeller. Blue-gray, somewhat shaded with duller gray. A 

 large half-pear-shaped white patch from middle almost to apex of costa, with 

 smooth clean-cut boundary; the dark part of the wing blackish around it. Hind 

 wing dull gray. 15 mm. 



Larva on thorn and apple. 



New Brunswick, and Montreal, Quebec, to Virginia and Western Pennsylvania. 

 New York: Ithaca, Schenectady, Albany. 



34. 0. impudens Walsingham. Typically cream-white, rarely dull gray; base 

 blackish, with outer boundary angled on cell; costa usually diffusely shaded with 

 blackish to beyond middle, obscuring the antemedial fascia, and toward the apex 

 more narrowly dark, cut with paired white striae. A broad, typically white, 

 antemedial fascia, in gray specimens distinctly composed of about four striae, 



