COMMON CABBAGE BUTTERFLY. 
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destroy the parent flies when they first begin to ap- 
pear in May, before they have had time to deposit 
their eggs. 
The butterfly is first seen on the wing about the 
middle of May, but in the south of England it often 
appears much earlier. It occurs abundantly in all 
parts of Britain, and seems to be equally plentiful 
throughout Europe. 
