CLOUDED YELLOW BUTTERFLY. 105 



that plant is not indigenous to Britain, it probably 

 feeds in this country on some diadelphous herb per- 

 taining to the same natural order. The butterfly 

 occurs in the south of England in considerable plenty 

 in particular years, while in others scarcely an ex- 

 ample is to be met with. It seems to prefer the vi- 

 cinity of the sea, having been found more copiously 

 than elsewhere along the south-east coast, particu- 

 larly in the neighbourhood of Dover. It is likewise 

 seen occasionally in the midland counties. Over 

 foreign lands C edusa is characterised by a very ex- 

 tensive range. It is well known in most portions 

 of the continent of Europe. Mr Burchell found it 

 in the south of Africa, and Mr Swainson has seen 

 specimens from the mountains of Nepaul. 



