io6 LEPIDOPTERA. 



o. L. cinereana, Haw. ; cinerana, Will'. — Expanse 

 f inch (15 mm.). Fore wings long and narrow, pale grey, 

 with the outer portion of its basal blotch black grey, and a 

 little dark clouding beyond. 



Antenna) grey dotted with white ; palpi, head, and thorax 

 white clouded with dark gre}^ ; abdomen pale brown. Fore 

 wings rather long and narrow, strongly folded at the base of 

 the costa, which is somewhat arched ; apex rather pointed, 

 hind margin perpendicular ; grey-white covered with delicate 

 grey lines ; basal blotch darker or blackened at its outer 

 edge, vvhich also is squarely angulated, but paler at the base 

 and toward the costa ; before the hind margin is a faintly 

 indicated ocellus containing large grey dots; costa loosely 

 dotted with dark grey, with a round black dot at the apex ; 

 cilia blackish grey. Hind wings and their cilia smoky 

 white. Female similar, but with the costa plain. 



Underside of the fore wings leaden brown with geminated 

 white costal dots. Hind wings leaden white. 



Not very variable, but the markings in some specimens 

 are pale grey and faint, in others an additional blackish 

 cloud lies just beyond the middle of the wing. 



On the wing late in July and August. 



Larva lively, but not very active, plump, smooth, rather 

 shiny, flattened beneath, and of equal thickness, except 

 the anal si-gment, which is small ; pale yellow-green, with a 

 dark green irregular dorsal vessel, spots invisible, hairs very 

 delicate ; head chestnut-brown with darker eyes and jaws ; 

 dorsal plate faintly tinged with brown ; anal plate hardly 

 perceptible. When full-fed, yellow, with brownish dorsal 

 vessel. 



May and June, on aspen, feeding between two leaves, 

 which it unites flatly together, and does not roll or fold, but 

 eats away the parenchyma from between. 



Pupa light brown ; between the leaves where the larva 

 has fed. 



