THE TUSSEH SILKWORM. 



23 



first feeds on the leaves of the jujube tree and of 

 the asseen, and is found in such abundance as from 

 time immemorial to have afforded a constant sup- 

 ply of coarse, dark-coloured silk, which is woven 

 into a cheap but very durable cloth. 



THE TUSSEH SILKWORM. 



When the caterpillars approach their full size 

 they are too heavy to crawl in search of their food 

 with the back upwards, as is usual with most 

 caterpillars, but traverse the small branches sus- 

 pended by the feet, as is shown in the figure. 



