LEPIDOPTERA 77 



pletion the larva changes to a pupa which in a -week or 

 two is transformed to a white moth living only a few days 



FIG. 74. Chinese silk worm spinning its cocoon of silk. Photograph, two thirds 

 natural size. 



FIG. 75. Four stages of the Chinese silk worm. The moth has emerged from the 

 cocoon and laid some eggs on it. Photograph, natural size. 



after emerging from its silken house. If the cocoons are 

 wanted for silk, a day or two after their completion they 

 are baked or steamed to kill the pupa. The thread form- 



