LEPIDOPTERA. 187 
a few species of the genus, namely, the Lycena (Polyommatus) 
Corydon, or Blue Argus (Fig. 155), which is not uncommon where- 
ever there is chalk, in May and August ; the Eycena (Polyommatus) 





Fig, 155.—Lycena (Polyommatus) Corydon. 
battus, or Brown Argus (Fig. 156), which does not occur here; the 
Lycena (Polyommatus) egon, which flies about our sandy heaths. 
The caterpillars of this genus, as also those of the preceding, 







Fig. 156.—Lycena (Polyommatus) battus. Fig. 157.—Lyczena (Polyommatus) egon 
are broad and flat, resembling wood-lice, with very short legs, and 
are very slow in their movements. 
In the numerous family of the Vanesside are placed the beau- 
tiful species known as the large and small Tortoise-shell, the 
Peacock, &c. 
The large Tortoise-shell Butterfly (Vanessa polychloros, Fig. 158) 
has the wings of a tawny colour above, and of a blackish brown 
below, with darker spots, bordered by a black band, with a stripe 
