648 WILLIAM T. M. FORBES 



4. Cream-white or darker. 



5. Spot at cleft an oblique shade, extending toward costa; fringe grayish 



and white 2. mathewianus. 



5. Spot at cleft round, or per])endioular to casta, or continued as a shade 



into upper lobe, or double. 



(5. Brownish, often with a double discal dot at lower angle of cell; a 

 blackish shade in fold to middle of wing; expanse 30 mm. 



14. balanotes. 



6. Not brownish, or small; often with dark points at ends of veins. 

 7. With a dark dot near base of cleft. 



8. Dot lying before base of cleft, terminal dots on second lobe 



lacking or faint. Hind wings grayish 11. paleaceus. 



8. Dot lying at base of cleft. 



9. Fore wings more or less tinged with clear yellow; at most 

 with one terminal dot at apex of second lobe. 



10. stramineus. 



9. No trace of clear yellow. Terminal spots evident, some- 

 times conspicuous 13. kellicottii. 



7. No dot at base of cleft, or faint traces; outer margin with 

 more or less distinct marginal dots or bars. . .12. lacteodactylus. 



I. First two feathers of hind wing lanceolate, third with relatively narrow fringe; 

 hind tibiae with upper spurs subequal, typically without a small tuft of hair 

 scales on dorsal side a little above the spurs; hind tarsi without crest (Oidae- 

 matophorus, Leioptilus ) . 



1. 0. cretidactylus Fitch. Brownish or creamy white; head, except between 

 antennae, and sides of abdomen, brown; legs white with some light brown; not 

 annulate. Fore wing shaded with brown on apex and dorsal margin, a dark fawn 

 h'ssural spot, sharply defined on the oiiter side, connected by a bar to costa. Hind 

 wing mouse gray; fringe not so dark as in P. eupatorii. 25 mm. 



Late June and July. 



New York and Essex County, New Jersey. New York : Vicinity of Buffalo. 



2. 0. mathewianus Zeller. White, more or less shaded with tawny brown and 

 dark brown scales; sometimes forming spots on the costa and an oblique shade 

 at the end of the cell, followed by a white line. Fringe on inner margin of first 

 feather with a brown patch, followed by a white bar. 21-27 mm. 



Western States. A very pale specimen apparently of this species has been taken 

 by McDunnough at Sebec Lake, Maine. 



3. 0. eupatorii Fernald. Legs brown ; hind tarsi mostly white, but annulate 

 with brown, fore and middle tarsi white. Fore wing pale gray-brown, dusted 

 with dark brown or yellowish white. Fissural spot diffuse, oblique, tending to 

 form an oblique streak by joining with the spot on costa of first feather; a pale 

 streak from base below costa almost to apex, not contrasting in very pale speci- 

 mens. Costal edge marked with a heavy black bar opposite the fissural streak, 

 and two smaller bars beyond. Second feather also sometimes streaked. Fringes 

 blackish, the dorsal very heavy and contrasting, with black dots at base, cut 

 with white, Hind wing dark gray. 22 mm. 



Caterpillar social, on Eupatorium purpurascens. Pale green; when nearly 

 mature, shaded with reddish, with an orange-ochre head, a yellow dorsal, a faint 

 and broken subdorsal, passing over tubercles i and ii, a narrow lateral, above iii, 

 and a broken stigmatal line. Principal dorsal setae long, black, rough, wart iii 

 with two long setae; iv+v with five longer white hairs, vi similar, a small sub- 

 primary behind the spiracle. Cervical shield with a fringe of white hairs over- 

 hanging the head, in front, and scattered black hairs behind. Pupa normal, green 

 with subdorsal reddish shades. Moth in July. 



