THE ORANGE TIP BUTTERFLY. 149 
purse, (Thlaspi bursa pastoris,) common lady’s 
smock, field cabbage, &c. (Cardamine pratensis.) 
Harris says it also feeds on wild cole. 
The caterpillar changes to a chrysalis about the 
end of June, which is greenish, with a yellow streak 
on the sides, and on the wing-cases of the male isa 
saffron-coloured spot, and it is not till the following 
May that it becomes a butterfly. ‘ 
This Papilio is common in fields and lanes, and 
near woods. 
