TORTRICID.-E—PERONEA. 225 



spotted alternately brown and white. Hind wings leaden- 

 white. 



This species is perhaps even more variable in its markings 

 than P. cristuna ; less restricted to certain patterns, but show- 

 ing every possible intermediate shade of variation, so that it 

 is barely within human power to furnish a varietal name to 

 each different form, and only between twenty and thirty are 

 so distinguished. 



On the wing from August till November, and after hyber- 

 nation in March and April, and iu another generation, in far 

 smaller numbers and also smaller specimens, in June and 

 July. 



Larva when full grown entirely pale green, generally with 

 a whitish efflorescence which is specially visible between the 

 segments, but the head and plates often have a brownish 

 tinge ; when young yellow-green or bluish-green with black 

 head and plates; when half grown pale green or dusky 

 green, the whitish efflorescence beginning to appear ; head 

 brown, plates green or the anal plate yellow. The speci- 

 mens of the summer brood, however, have sometimes, when 

 full grown, a black head and plates. 



May, and a second generation from July to September, on 

 sallow of various species, drawing together two leaves or 

 folding them, or else joining together the leaves of a young 

 shoot, or fastening them to the stem ; when common dis- 

 figuring the bushes. Other species of plants are recorded as 

 food, but in my own experience some species of sallow is 

 always chosen ; and there is some small confusion about the 

 food of closely allied species. 



Pupa slender, black-brown ; in a silken cocoon among 

 dead leaves and rubbish on the ground, or in moss; ap- 

 parently always leaving the larval habitation before 

 spinning up. 



The moth has curiously obscure and secret habits. With 

 VOL. X. P 



