2 IS 



middle of September, and flying until about the middle of October in tbe 



New England States. The larva is not uncommon, feeding on sedges, etc. 



In coloration, the ten specimens collected by Lieutenant Carpenter do 

 not differ from eastern ones; but on comparing them (5c? and 5 9) with fifteen 

 (10 $ and 5 9) specimens from Massachusetts, I find that the wings of the 

 Colorado moths are uniformly more pointed toward the apex, the outer edge 

 more oblique, and the wing narrower than in the eastern examples. The 

 fore wing of the largest Colorado moth measured 0.95 inch in length, and 

 that of the Massachusetts specimen 0.90 inch. 



Larva. — Head of the same width as the prothoracic segment, divided by 

 a slight median crease into two lobes. The body is cylindrical, of uniform 

 width throughout, a little thicker over the first pair of abdominal feet; pale 

 straw-yellow. Two subdorsal brown hair-lines, and two similar ones on the 

 sides, interrupted by two, large, conspicuous, angular, black dots, — a pair on 

 each ring. Beneath, three hair-lines on each side of the body. The head 

 and prop-legs are dotted with black. Length, 1.50 inches. It feeds in Maine 

 on Car ex Pensylvanica. 



It has been found, August 1-14, in Danvers, Mass., by Mr. Gray, feeding 

 upon the blackberry, wood-wax, wild indigo, etc , transforming into the pupa 

 August 14, previously spinning a slight but well-formed web of yellow threads 

 among the leaves. 



Pupa. — Pale yellow, dotted slightly with black. Head well rounded; 

 abdomen acute; wings reaching to near the hinder edge of the fourth abdom- 

 inal ring ; length, 0.68 inch. It remains in the pupa state from three to 

 four weeks. For figures of the larva and pupa see plate 13. 



H^EMATOPIS Hiibner. Plate 2, fig. 6. 



Eamatopis Hiibner, Verz., 301, 1818. 



Geyer, Hiilm. Zufcr., 9, figs. 823, 824, 1837. 



Ouen., Phal., ii, 170, 1857. 



Walk., List Lop. Het. Br. Mus., xxiv, 1053, 1862. 



Front of the head rather longer than broad ; male antenna-, plumose, 

 the branches very slender. Palpi slender, acute, projecting a little beyond 

 the front. Fore wings long and rather narrow, much produced toward the 

 apex, which is pointed but not falcate; costa straight, outer edge very ob- 

 lique. Hind wings rounded at the apex, outer edge with a distinct bend; 

 the inner angle reaches to the end of the abdomen. Venation: six subcostal 



