LEPIDOPTERA. 



187 



a few species of the genus, namely, the Lyc&na (Polyommatus) 

 Corydon, or blue Argus (Fig. 155), which is not uncommon where- 

 ever there is chalk, in May and August ; the Lyccena (Polyommatus) 



Fig. 155. Lyeaeua(Polyommatus) Corydon. 



battus, or brown Argus (Fig 156), which does not occur here ; the 

 Lycaena (Polyommatus) agon, which flies about our sandy heaths. 

 The caterpillars of this genus, as also those of the preceding, 



\ 



Fig. 156. Lycsena (Polyommatus) battus. 



Fig. 157. Lycaena (Polyommatus) segon. 



are broad and flat, resembling wood-lice, with very short legs, and 

 are very slow in their movements. 



In the numerous family of the Vanessidae are placed the beau- 

 tiful species known as the large and small Tortoise-shell, the Pea- 

 cock, &c. 



The large Tortoise- shell butterfly ( Vanessa poly chloros, Fig. 158) 

 has wings of a tawny colour above, and of a blackish brown below, 

 with darker spots, bordered by a black band, with a stripe of 



