238 WILLIAM T. M. FORBES 



5. Fore wing bright yellow, mottled with red. 



6. A triangular darker shade at end of disc 18. robiniella. 



6. No such shade 19. lecohtella. 



5. Fore wing dull red-brown, practically immaculate 12. fulva. 



5. Fore wing dull yellowish or grayish. 



6. Thorax pale; fore wing mottled and scaled with white, base con- 

 trastingly paler; fuscous patch in cell faint; fresh specimens with 



slight pink suffusion 15. senecionella. 



6. Brownish ochreous; thorax darker, with a little black behind. 



9 l /2. ptelecs. 



6. Anterior half of disc of thorax gray; wings evenly clay-color, the 

 base hardly paler; patch in cell contrasting, small, nearly black, 



no pink 10. 



6. Wings powdery pale luteous, but without white; with fuscous, and 

 raised black scales 9. scabella and 8. plummerella (see above). 



1. A. atrodorsella Clemens. Cream color; most of thorax and costal half of 

 base of fore wing black; six or eight black costal dots; a rosy shade over end 

 of cell, running into streaks on the veins; a dark costal-apical patch; black 

 terminal dots, and rosv fringe. Upper part of face blackish, vertex rufous. 

 20-23 mm. 



September to April. Caterpillar green, with darker dorsal and subdorsal stripes, 

 blackish tubercles and spiracles; yellow-brown head, and a light cervical shield 

 with a black dot at each side; feeding on Bidens, folding the leaf lengthwise. 



New Hampshire to District of Columbia, west to Wisconsin. New York: Fen- 

 tons (Lewis County), Crosby (Lake Keuka), Ithaca, Delmar, Schenectady, New 

 Windsor, Staten Island. 



2. A. canella Busck. White; palpi mottled with light brown, vertex brown; 

 fore wings lightly dusted with black and brown scales except toward the base. 

 Middle of costa with a black and brown shade. Discal dots a and b usually 

 distinct, black or fused into a bar. Hind wings light fuscous with pale fringes. 

 20 mm. 



July to September. The related European species, D. alstrcemeriana, feeds on 

 Conium. 



Southern New Hampshire; Connecticut; New York; Washington State. New 

 York: Wilmington, Ithaca, Catskills. 



3. A. pulvipennella Clemens. Clay color, more or less shaded with reddish, 

 and heavily dusted and shaded with black-brown, the whole effect powdery wood- 

 color; base paler; costa with short black bars. Discal dots slightly raised in 

 perfect specimens; a and b black, d with a white center, c obliterated, clavifonn 

 indicated by a black dot; fringe reddish. Face and inner side of palpi whitish; 

 vertex rose-brown, 22 mm. (eupatoriella Chambers, solidaginis Walsingham). 



September to May; July; the summer brood probably dropping out northward. 

 Very common. Caterpillar green, sometimes with darker dorsal and lateral lines. 

 Tubercles, head, and cervical shield nearly concolorous; head marked with brown; 

 cervical shield with lateral brown dots, anal plate brown-edged. Caterpillar fold- 

 ing the leaves of Eupatorium and Solidago lengthwise. 



There is a rare coal-black aberration. 



Massachusetts to Virginia, Illinois, and Missouri. New York: Fentons (Lewis 

 County), Ilion, Crosby (Lake Keuka), Ithaca, Schenectady. 



4. A. argillacea Walsingham. Pale gray, hardly yellowish, lightly sprinkled 

 with black; a small blackish patch near end of cell; base of inner margin pale, 

 followed by a blackish shade. Terminal dots weak, outer discal dots inconspicuous, 

 the white centers dull and not contrasting. 20 mm. 



This species is the American representative of A. yeatiana, which eats Umbelli- 

 ferae. It has been taken in March and in September. 



