238 THE INSECT WORLD. 
of a reddish green. One race raised in Tuscany, near Pistoia,’ 
has cocoons of a pale rose colour; and, lastly, mention has been 
made of cocoons of a purple colour. 
Ze QJ ‘ S 
TW S 
F ATK AN = 
arta \ Ye 
‘i MN RSS 
AOS 
Se 
Yy 
3 3 i 
\\ 
i 
a) 
di 
aN 
/ 
Zi / 
/j 

Fig. 216.—Larva, pupa, cocoon, and moth of Bombyx mori. 
When the cocoons are completed, the people in charge of the 
rearing establishments separate them from the heather and sell 
them to the silk-spinners. But they must manage to get these 
cocoons into a state in which they will remain entire during a 
