120 



QUIKCE CULTURE. 



Finding the larvae every year on some of my quince 

 trees, I have studied their habits with a great deal of in- 

 terest. So far as I know, I am the first to prove that 



Fig. 106 THE POLYPHEMUS MOTH, FEMALE. 



they have two broods a year. Packard is certainly mis- 

 taken when he speaks of "our native species bearing but 

 a single crop of worms," for this one is double-brooded. 

 The chrysalis that winters in the cocoon is proportion- 

 ately short and thick, of a reddish brown, and distinctly 



Fig. 107. THE POLYPHEMUS MOTH, MALE. 



marked in cylindrical rings. The larvse of the first brood 

 only pupate about twenty days, spinning their cocoons 

 in June and July, according to the time they were 



