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yellow, have no legs, they change likewise 

 into piipas, which have at first the same 

 colour, but grow soon darker and greyer. 

 This I have observed when I cut the 

 pupa of the papilio open, closed it care- 

 fully up again, and looked at it after some 

 days. The number of the little pupas is 

 often from 200 to 300 in one. Among 

 them I observed, sometimes, some larger 

 ones of a different form, which as I 

 soon found, produced different insects, 

 Tliese maggots do not spin themselves 

 up in webs as others do, when they 

 change into pupas, nor hav^e they occa- 

 sion for it, for the skin of the large pupa 

 is a safe habitation for them, where they 

 can remain without danger, until they 

 acquire their perfection. This is about 

 a fortnight in sunnner, but those which 

 are produced in autumn remain all the 

 winter. They deposit their pupa-skin 

 all at one time, after this, they eat 

 through the large pupa, and fly for some 

 time about it, as the bees do about their 

 hives. Some of them copulate imme» 

 diately, and the females go to find ano- 



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