THE LEPIDOPTERA OR BUTTERFLIES AND MOTHS 27 



product which it is desired to make. The moth makes its 

 escape from the cocoon after moistening the end with a 



FIG. 1 8. Silk-worm moth eggs and cocoons. 



secretion which softens the cementing substance between 

 the fibers. It is a very sluggish sort of creature, scarcely 

 able to fly, and takes no food. 



FIG. 19. A sphynx moth. (After Lutz.) 



Toward evening one often sees the sphinx moths or 

 hawk moths, (Sphingidae) flying about in search of flowers 



