34 CATERPILLAR OF THE OAK. 
spinning a new tent, establish themselves 
upon its trunk. They at length change 
to chrysalids, and remain in security 
till they come forth as moths. 
Lucy, Are there any other kinds, that 
live so comfortably together ? 
Mother. Yes, there are ; we have one 
which is very common in England. It 
is small, of a dark colour, and produces 
a little grey moth ; it lives in great num- 
bers upon the euonymous tree, surrounded 
by a sort of web, spun with strong threads 
from branch to branch. At a little dis- 
tance the tree looks as if it were covered 
with cobwebs.—^ 
