200 LEPIDOPTERA. 



grey ; while iu others, especially Continental examples, the 

 dark blotches are much intensified, and an additional one 

 ajipears at the base. 



On the wing from May till the Ijeginuing of July, and 

 usually a second generation from the end of July till 

 September or even October. 



Larva one inch and an eighth in length : middle segments 

 plump and round but each becomes smaller than its prede- 

 cessor from the middle to the extremities, giving the body a 

 strongly attenuated appearance ; head broad but flattened> 

 the lobes rounded and polished ; divisions of segments con- 

 spicuous, and each segment crossed by a central transverse 

 groove ; skin soft and semi-translucent, clothed with a few 

 short hail's ; anal prolegs extended widely behind the anal 

 segment. Head straw-colour with darker brown markings ; 

 general colour dull pinkish-brown (brighter in young speci- 

 mens), dorsal stripe pale pinkish-yellow, intersected through- 

 out by a dark olive-brown line ; subdorsal stripes also pinkish- 

 yellow, broadly bordered above with olive-brown, indeed this 

 dark colour forms a broad stripe between the dorsal and 

 subdorsal lines ; spiracles and raised dots distinct, black ; 

 ventral surface, legs, and prolegs greyish-green. The skin 

 is so transparent that the movements of the muscles can be 

 distinctly seen. 



July and the beginning of August ; and a second genera- 

 tion in October; on lluhia percrjrina (madder), eating the 

 substance of the leaves from the underside, but leaving the 

 upper skin intact, so that it forms a thin white pellicle, held 

 iu shape by the strong midrib and margins of the leaf, and 

 gives the plant a singular appearance, as though disfigured 

 with an abundance of small white bladders. At the same 

 time the larva conceals itself in a hammock or movable case 

 composed of a dead rolled leaf of some other plant —1 have 

 found it in such a rolled leaf of T'tu-rium scorodonia, but 

 there is no reason whatever to suppose that it had fed upor 



