THE LEPIDOPTERA 



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The life history in both species is quite similar. Winter is passed 

 as a pupa (Fig. 306) iii the ground and in these insects the tongue 



FIG. 306. Pupa of the Southern Tobacco Worm (left) and of the Northern Tobacco 

 Worm (right), natural size. Note difference in length of the tongue case. (From 

 Britton, Sixth Kept. Ent. Conn. Agr. Exp. Sta. 1906.) 



FIG. 307. Full-grown larva of Southern Tobacco Worm, natural size. (From Britton, 

 Sixth Kept. Ent. Conn. Agr. Exp. Sta. 1906.) 



has a separate case in the pupa. The moths appear in the spring 

 and lay their eggs singly on the leaves of their food plants, and the 



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