SOLITARY NESTS. 
43 
When it has rolled it enough, it weaves a few 
thicker threads on the outside, so thick that they 
may he compared to cables, and fixes them to 
the part of the leaf that is not bent, just as we 
fasten ropes to the canvass of a tent, and then 
peg them to the ground. Thus it is quite impos¬ 
sible for the leaf to unroll itself. 
And now let us step into that plantation, and 
see what is going on amongst the osiers. Do 
you notice how curiously the long narrow leaves 
of the willow are tied together? If we pulled 
them open, we should find a caterpillar inside. 
Willow leaves tied. 
