403 



than in A. vernata. A marginal row of intervenular black dots. Fringe 



paler, clear, concolorous with the hind wings. The latter pale ash, clear, 

 without any markings, except a faint discal dot. Beneath, clear like the hind 

 wings above and with four discal dots, those on the hind wings largest, with 

 a costo-apical black spot; fringe concolorous with the wings. 



Length of body, 0.30-0.40: fore wing, 0.50-0.(17: expanse of wings, 

 1.12-1.28 inches. 



It varies much in the distinctness of the lines, usually represented by 

 spots on the costa, median vein, and inner edge. 



Salem, February 25, March, April, and Boston, Mass. (Emerton, San- 

 born, Packard); "New Haven, Conn." (Herrick); Albany, N. Y. (Lintner); 

 Illinois (Shimer, Riley): Missouri (Riley); Dallas, Tex. (Boll, Mus. Peab. 

 Acad. Sc). 



The pale-ash transparent wings, the few black dots and costal spots, and 

 oblique, apical, black streaks, and the four discal dots beneath, characterize this 

 species. One of the two Texan specimens received oidy differs from Massa- 

 chusetts examples in having the markings a little more distinct, the narrow 

 black lines being more distinct than usual. 



Female. — Pale gray. Body hairy, acute at the end of the abdomen, the 

 scales loose, the body being somewhat hairy. Head dark; thorax whitish- 

 gray; sides of body and beneath whitish-gray, with a lateral row of dark 

 spots; sometimes a large square black spot on hinder part of the thorax. 

 AntemiEe loosely ciliated. A dark stripe along the back, sometimes consist- 

 ing of two black lines filled in with white between, or replaced by a row of 

 white, dorsal, abdominal spots. Legs spotted and ringed with black. The 

 segments of the abdomen armed with two irregular rows of sharp, distinct, 

 slender spines. End of abdomen elevated in walking, more acute than in 

 autumnata. 



Length, 0.25-0.40 inch (fifty specimens described from life). 



To show that, as stated by Messrs. Morrison and Mann, Peck had the 

 present species before him when he drew up his account, I quote his original 

 description, which applies throughout, as do his drawings, to the spring brood : — 

 "Egg elliptic, So of an inch in length, of a pearl colour with a yellowish cast. 

 Eggs laid in thirteen days after the females appear." lu twenty-one days, the 

 worms appear, and have ten feet, of which four are posterior. "The larva 

 or caterpillar is, when full grown, about nine lines long, t he head pale, marked 

 on each side with two transverse blackish stripes; the back ash coloured, 



