132 



CRABS AND INSECTS, 



white cocoon. They now change to a chrysalis, and in 

 eight or nine months escape, a perfect insect. A South 

 American member of this family has a swinging, basket- 

 like cocoon (Fig. 167). 



FIG. 166. The silk-worm, moth, and cccoon, on a mulberry branch. With 

 view of silk works, illustrating the economic value of the worm. 



