515 



very large, the third tooth especially being long and often twice as large as 

 the others. Beneath, paler than above ; wings and legs thickly speckled with 

 large transverse strigse with a rusty tinge. The lines, are very distinct, 

 broader, and the marginal row of diffuse lunules more distinct than above; 

 fringe rusty-brown ; edge of wing paler gray than in the middle, in the female 

 decidedly frosty-gray, and contrasting well with the rest of the wing. More 

 common northward than serrataria. 



In some specimens is a subapical row of two or three round black spots. 

 Discal dots either distinct or obscure, and almost obsolete. Mr. Walker's 

 type is not in the British Museum ; but his description, brief as it is, applies 

 well to this species. 



Length of body, <?, 0.70-0.80, 9, 0.55-0.80; of fore wing, <S , 0.80-0.90, 

 9, 0.80-l.< ! 0; expanse of wings, 2.00 inches. 



Canada (Walker) ; Brunswick, Me., July, August, frequent (Packard); 

 Massachusetts (Sanborn, Stratton); Amherst, Mass. (Peabody); Brookline, 

 N. Y., July 16 (Shurtleff); Albany, N. Y. (Lintner); Oneida, N. Y. (Haw- 

 ley); New Jersey (Sachs); Detroit, Mich. (Swartz). 



This species is one of the largest of the genus, and, though exceedingly 

 variable, may usually be determined by the very deeply serrate wings, by the 

 rusty-ochreous hues, the irregular, dentate, not very distinct lines, and by the 

 ochreous under side, mottled, however, with rust-brown. While in the form 

 of the wings it is much like serrataria, in coloration E. obtusaria is more likely 

 to be mistaken for the former. I append the description of an unusual form 

 from Illinois : 



1 i. — Fawn-color, with diffuse dark-brown bands; beneath, with an 

 ochreous tinge. Body fawn-color like the wings; a broad, diffuse, curved, 

 basal band (often obsolete); a similar mesial band not much curved, crossing 

 the site of the discal dot, which is obsolete. The outer line is broad, diffuse, 

 dark brown, becoming paler externally; it is straight to just before the costa, 

 where it curves, though it is not angulated; between the inner and outer- 

 lines the wing is tinged with ochreous ; beyond the outer line the border is 

 lawn-colored, with dark strigre; edge more ochreous, fringe darker. An 

 apical oblique dark streak, concolorous with the three lines ; edge of the 

 wing scalloped slightly, apex very acutely produced. Hind wings deeply 

 indented, both acute, tinged with ochreous within the outer line; beyond, 

 fawn-color, with more numerous and distinct stripe than toward the base of 



