ARGYNNIS EUPHROSYNE. 79 



to make the stripe there appear much whiter than on the 

 others. 



A very faint edging of greyish helped to make the 

 black dorsal stripe visible. The spines and legs were 

 black, and large in proportion ; the prolegs of a dark 

 smoky tint, inclining to reddish. 



It at first refused to eat when placed on growing 

 plants of dog-violet and primrose, but within twenty- 

 eight hours it moulted, and then, when the sun shone 

 on it, its appetite returned. Its pace when walking was 

 very rapid ; sometimes it fed for a while on the dog- 

 violet leaves and sometimes rested quite still basking in 

 the sun's rays ; when these were withdrawn it retired 

 to the underside of a leaf and there remained, appa- 

 rently without motion, till the hour (viz. 2 p.m.) of the 

 next day which brought the sun round to the window 

 in which its cage was placed, and then at once it came 

 forth and walked actively about, fed and basked as 

 before. After a few days it began to appear unwell, 

 ceased to feed, remained on the earth, and kept out of 

 sight for about four or five days. 



Towards evening of the 12th of April it re-appeared 

 and greatly rejoiced me by showing itself on the side of 

 its glass cylinder in a new coat of black velvet, orna- 

 mented with a subdorsal row of bright greenish-yellow 

 spines with black tips and branches, all the other spines 

 being wholly black ; the prolegs now appeared dull 

 pinkish. 



By the 16th of April its pale stripe above the legs 

 had become visible, but greyish in tint, the whitest 

 portion being on the third and fourth segments, the 

 whole of the back remaining of a deep velvety-black- 

 ness. The greyish-white stripe above the legs was 

 formed by a series of whitish spots with black centres, 

 and as they were more or less aggregated, so the 

 appearance was whiter or greyer. The anterior legs 

 black ; prolegs with their tips brownish and semi-trans- 

 parent ; the ventral surface brownish-black. 



Towards the end of April it attained its full dimen- 



