CONCEALMENT OF THE PUPA. 51 
it lias ! and I do see a little gold upon 
it! 
Mother. Several of the butterfly pu- 
pae have some gold ; but I have never 
seen any moth pupae that had. There is 
some variety in the points and protube- 
rances of the different butterfly pupae, but 
they have all a general resemblance in 
shape, though not in colour, to this one. 
Lucy. Where are these chrysalids 
to be found ? I think they must run great 
hazard of being destroyed. 
Mother. When the caterpillar is 
about to change, it creeps up a wall or a 
tree ; and, having spun a small mat, 
on which it fixes its hind feet, it then 
begins to spin a band across its body. 
This it effects by twisting its head back- 
wards and forwards, fastening threads to 
the wall, first at one side, and then at the 
other, which are all carried across its 
body, till the band is strong enough to 
support its weight. After having rested 
for a day or two it then changes, and the 
skin falls to the ground ; but at the tail 
D 2 
