66 THE BOOK OF BRITISH BUTTERFLIES. 



When full-fed, the larva, which is seldom seen in 

 England, is i-Jin. long, and velvety dark green in colour. 

 In the spiracular region is a whitish-yellow line fading 

 above into the ground-colour. There is a pink spot 

 between each pair of spiracles. The fu\J-fed larva of 

 C. hyale and C. edusa are very similar, but the former 

 has longer and darker hairs, and a rougher and less 

 rounded appearance, so writes Mr. H. Williams in an 

 interesting paper in The Entomologist, xxvi., p. 7. 



52 



COLIAS HYALE. 



On the same authority we have it that the pupa of 

 C. hyale is almost identical in shape, colour, and 

 markings with that of C. edusa, described below, but, 

 perhaps, is rather more slender and upright. It is 

 suspended by the anal extremity and girt, is green, 

 with a yellowish stripe down each side, and has the 

 wing-cases bordered with the same colour. 



The imago of hyale (Figs. 52 and 53) differs from that 

 of edusa in that the ground-colour is bright yellow instead 

 of orange, and that the male, as well as the female, 



