118 
SMALL WHITE BUTTERFLY. 
to the large cabbage species, the complete distinction 
of the two is well evinced by the appearance of the 
respective caterpillars. That of P. Rapes is light- 
green, with a pale line along the back, and a whitish 
streak, somewhat punctured with yellow, on each 
side of the belly. It feeds on cabbages, turnips, &c. 
and is often found associated with the larva of P. 
Brassiccs in devastating our garden produce. It ge- 
nerally insinuates itself between the folded leaves in 
the centre of cabbage and cauliflower plants ; hence 
it is named in France ver du cesur. The butterfly 
is very common in all parts of this country, and in 
most quarters of Europe. It appears in the end of 
April or beginning of May, and a second flight takes 
place in July. But the insect is at all times so 
abundant, that there is probably a succession of broods 
throughout the summer and autumn. The markings 
vary considerably. 
