THE BOMBYCINA. 123 
with a hump upon the third or fourth segment, and with their 
tail ends furnished with two prolongations, have become of a 
delicate green colour, and they are marked with a lozenge of a 
brownish tint, and a white border on the back. 
The larva has strong membranous legs to carry its heavy body, 
and they are furnished with long spines. The tails are nearly 
THE PUSS CATERPILLAR AND THE MALE MOTH. 
white, and are ornamented with black tubercles. The greatest 
peculiarity of the insect is this development of the last two legs 
into two appendages, which are, in fact, tails pierced for the 
projection of tentacules which are doubtless of use to it. Perhaps 
the caterpillar may use them to scare the ichneumons away 
when they are about to lay their eggs in its tempting looking 
body. When fully grown the larva descends to the foot of the 
tree upon which it has been feeding, and makes a very thick and 
tough cocoon, by sticking together vegetable tissues with a great 
deal of viscous secretion. It is then metamorphosed, and passes 
the autumn and winter in the chrysalis state. 
