LARENTWAL - EMMF.L F.SIA . 24 1 



pure white ground colour ; hind marginal region broadly pale 

 grey, with a darker cloud above the middle running into the 

 apex, but intersected by a subterminal line of ])ure white 

 crescents ; extreme hind margin dotted with dark grey and 

 edged with wliite ; cilia pale grey. Hind wings small hut 

 rather long, rounded behind ; white shaded at the base with 

 grey, and having two parallel rippled greyish stripes along 

 the hind margin ; cilia pale grey. Female similar. 



Underside of the fore wings smoky brown to the second 

 line, which is indicated by a white line shading off to pale 

 grey, this again divided by a white line. Hind wings 

 greyish-white ; central spot smoky-black ; a slender grey- 

 brown stripe crosses the middle, and two more lie along the 

 hind margin. Body and legs dark grey. 



There is some variation in the markings constituting the 

 central band ; in some specimens this is cpiite restricted to 

 the costal blotch, but more frequently there are faint dorsal 

 and intermediate cloudings or markings. Specimens from 

 the Hebrides usually have a tolerably complete black band. 



On the wing from the end of May till July. 



Larva when full grown half an inch long ; the segments 

 plump and well-defined, each having two transverse wrinkles 

 near the end ; tapering gradually from the seventh segment 

 forward to the head, and backward a little from the tenth to 

 the thirteenth ; head small, very glossy, greenish-yellow 

 faintly tinged with pink, and having two rows of pink 

 freckles down the front of each lobe, the ocelli large and 

 dark ; general colour green, varying in richness in diH'erent 

 individuals, well contrasted with a design on the back which 

 there occupies the spaces between the raised dots, beginning 

 on the second segment as merely twin lines, but on all the 

 others consisting of three equally thick lines of very dark 

 crimson, of which the middle one is straight, but each outer 

 one in its course along each segment bends inward a little 

 towards the middle in symmetrical progression, enclosing a 



VOL. VIII. y 



