328 LEPIDOPTERA. 



Hind wings faintly emarginate below the apex, otherwise 

 rounded, pale smoky-brown, rather darker along the hind 

 margin ; cilia brownish- white, with white tips. Female 

 accurately similar, but with a stouter body and scarcely 

 any anal tuft. 



Underside of the fore wings pale smoky-brown, costal and 

 hind margins paler or whitish ; a yellow line runs along the 

 base of the cilia. Hind wings dusky white, dusted with light 

 brown along the costal region and with smoky-brown on the 

 nervures ; central spot smoky-black ; beyond it is a transverse 

 stripe, composed of smoky-black clouds, on the nervures; cilia 

 purplish-white. Body and legs whitish-brown. 



Not variable, except in a small degree, in size. 



On the wing in July and August. 



Lakva smooth, stout, slightly attenuated at each extremity, 

 head, and a plate on the second segment, black ; colour green 

 (the tint of a poplar leaf), shining; dorsal, subdorsal, and 

 spiracular lines white; raised dots black, small, but very 

 distinct ; legs and tips of the prolegs black. 



April and May, on poplar, feeding within a leaf which is 

 folded down and fastened with silk. (0. Fenn.) Also upon 

 aspen, from the first either folding a leaf or joining two 

 leaves, living in the habitation so formed during the day 

 and feeding at night. The winter is passed in the egg-state. 



Pupa rather stout, pale red or burnt-sienna brown ; anal 

 extremity blunt, with projecting bristles. In a soft, compact, 

 silken cocoon covered externally with sand ; subterranean, 

 but often hardly buried. (C. Fenn.) 



The moth most likely hides in poplar-trees during the day, 

 but is rarely seen at that time ; indeed, it is not commonly 

 seen at any time, and the vast majority of specimens in 

 collections have been reared, the larva being easily found. 

 Yet the moth may be taken occasionally at light, at the 

 blossoms of heather, and on honeydew. I have even found 



