118 SM ALL 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. 

 Brassicce 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 cceur. 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. 



