178 THE BOOK OF BRITISH BUTTERFLIES. 



The young larvae soon retired for the winter, passing 

 that period in continual danger from the floods. They 

 were full-fed in June, the chrysalides could be found in 

 July, and the imagines were out till August. 



The larva had a convex dorsal surface and a flat 

 ventral one hiding the legs and claspers. The segments 

 were clearly divided, and the tiny head was retractile 

 within the second. The colour was green, with a darker 

 stripe down the back. 



The stout, blunt chrysalis, which was suspended by 

 the anal extremity, and girt, has been described as being 

 first pale green and then ashen, and as having a black 

 dorsal line, and two short white ones on each side. 



The costal margin of the fore-wings of the imago 

 (Figs. 197 to 199) is nearly straight, and their tip rather 

 pointed. The hind-margin of the fore-wings is rounded, 

 and of the hind-wings a little undulating. The ground- 

 colour of the upper surface is a very rich copper. In 

 the male (Fig. 198) the hind-margin of the fore-wings is 

 black, and there is a black streak half-way between the 

 margin and the base, while between this again and the 

 base is a black dot. The hind-wings have a notched 

 black hind-margin and a black streak half-way between 

 the hind-margin and the base. The female (Fig. 199), 

 which is larger than the male, has on all the wings a 

 similar but broader hind-margin. Parallel with this, on 

 the fore-wings, is a row of seven black spots, and in the 

 discoidal cell are three of the same colour, decreasing in 

 size towards the base of the wing. On each hind-wing 

 there is a copper band within the black hind-margin, 

 and the rest of the wing, except the nervures, is 

 either black or densely sprinkled with black scales. 

 The ground-colour of the under-surface (Fig. 197) is, on 

 the fore-wings, light orange-red, with a bluish-grey hind- 



