452 WILLIAM T. M. FORBES 



4. 0. polluxana McDunnough. Similar to 0. fuscalbana. Ground blackish, with- 

 out any yellow overscaling. Antemedial fascia about as in 0. fuscalbana; post- 

 medial more irregular, and broken into by patches of the black ground; the 

 blackish medial area extending in two strong teeth at the end of the cell with a 

 white indentation between them. Outer markings almost entirely brown-black and 

 white, without the gray subterminal band of 0. fuscalbana. 25 mm. 



.June and July. 



New York to Alberta. New York: North Twin Brook (Mt. Marcy), Peru. 



5. 0. campestrana Zeller. Similar to 0. fuscalbana. Ground overlaid with 

 slender yellow scales. Antemedial band more distinctly made up of two pairs of 

 fused white striae. Postmedial white band on costal half formed of two pairs of 

 white striae; below the middle the anterior pair becoming gray and turning abruptly 

 in to the middle of the inner margin, while the outer pair becomes a broad white 

 band extending to the anal angle; the two enclosing a triangular blackish patch 

 between them. Outer part of wing blackish, with strong paired white costal 

 strise, and a couple of longer white striae, defining the usual subterminal patch. A 

 white subterminal line toward apex. 15 mm. (dealbana Walshingham, not 

 Walker). 



June. Larva on cherry. 



Generally distributed and not rare, but generally confubed with 0. fuscalbana. 

 New York: Peru, Rock City, Ithaca, Trenton Falls, Albany (New York State 

 Museum ) . 



6. 0. mengelana Fernald. Eyes very small. Ground powdery black on a blue- 

 gray base; antemedial whitish fascia distinctly composed of a group of three or 

 four coarse strise, fading out below; postmedial white fascia broad and distinct 

 toward costa, of two pairs of strise, becoming obscure below the middle of the 

 wing. Outer margin with the blue-gray dominant. Outer half of fringe cut with 

 white. 15 mm. 



July. 



Greenland. This is probably a widespread arctic species, but I have seen no 

 other specimens. 



7. 0. turfosana Herrich-Schaeffer. Fore wing with nearly even, broken, trans- 

 verse striation of blackish, clay color and lead gray, but with the pale strise more 

 or less paired, especially at the costal edge. Outer part of wing normally more 

 heavily shaded with the yellow. A white spot at end of cell, partly defined with 

 blackish. Fringe blackish, irregularly cut with white. Hind wing dark gray. 

 16 mm. 



June and July. 



Labrador ; Maine ; Europe. 



8. 0. intermistana Clemens. Blackish gray with a variable amount of yellow 

 and white scaling. Fore wing with confused paired white or light blue-gray 

 double striae, cutting up the ground into patches toward the outer margin, but 

 leaving fairly definite narrow antemedial blackish bands, or with the strise toward 

 base confined to costal and dorsal edges. Scaling sometimes gathering to form a 

 pale shade at anal angle. A white discal dot. Fringe black and white. 18 mm. 

 (lessellana Packard). 



August. 



Labrador to Alberta; Mt. Washington, New Hampshire. 



9. 0. septentrionana Curtis. Blackish brown, somewhat variegated with gray, 

 leaving a darker oblique fascia as in 0. intermistana; costa with six or seven 

 pairs of white strise; fringe pale, spotted with brown at the base. Hind wings 

 apparently variable. 15 mm. (Sciaphila primariana Walker; Penthina fulvi- 

 frontana Packard ) . 



Arctic America south to Labrador. 



10. 0. schulziana Fabricius. Fore wing black, heavily overlaid with narrow 

 bright yellow scales, with somewhat confused and broken paired white strise, the 



