INSECTS 



21 



FIG. 16. Life history of silkworm moth. (Prepared by Kny-S cheer er Co. 

 Photographed by E. R. Sanborn, N. Y. Zoological Park.) 



China as early as 2600 B.C., and was not introduced into Europe 

 until 530 A.D. After the latter date the culture rapidly increased, 

 and soon became prominent in Turkey, Italy, and Greece, and has 



