Hedgerow Life 
protruded; altogether it looks a most 
uncanny creature. It spins a cocoon on 
the bark of the willow-tree or poplar-tree 
it has been feeding on, but hides itself in 
a most clever way while in the defence- 
less chrysalis state by imitating the 
willow-bark so marvellously that when 
the cocoon is finished it looks exactly 
like the rest of the tree-trunk. I watched 
one making this cocoon the other day, 
and it was really most interesting to see. 
First of all it went into a deep crack in 
the bark, and gnawed out a hole there 
big enough for itself. Then it spun all 
round itself—over its back a cocoon of 
very loose, coarse silk, and filled up the 
loose meshes or openings with a sort of 
gummy liquid. And into this sticky 
liquid it pushed bits of bitten-up bark 
from inside, until it was covered with 
oP) 
