THE SWALLOW-TAIL BUTTERFLY. 163 
only two species of Swallow-tail Butterflies that 
have yet been found in Britain. Both are very 
scarce; but the present less so than its congener. 
The caterpillar is smooth pale green, with black red- 
spotted rings. The chrysalis is of a yellowish green 
colour. Harris says it feeds on wild fennel and 
carrots in July and September. He mentions that 
one he found, remained in the chrysalis state from 
the 23d September till the 15th May following ; 
and another, that changed July 14th, produced a 
butterfly on the 10th of August. He adds, that the 
species was found in the meadows of Bristol and 
Westram. It also inhabits Kent, Norfolk, Hants, 
and Cambridge. 
This insect is common on the Continent of Eu- 
rope. 
