RESEMBLANCES AMONG ANIMALS. 61 
exposed and moved its head and antenne as many 
other butterflies do, its disguise would be of little 
avail. We might be sure, however, from the analogy 
of many other cases, that the habits of the insect are 
such as still further to aid its deceptive garb; but: 
we are not obliged to make any such supposition, since 
I myself had the good fortune to observe scores of 
Kallima paralekta, in Sumatra, and to capture many 
of them, and can vouch for the accuracy of the fol- 
lowing details. These butterflies frequent dry forests 
and fly very swiftly. They were never seen to settle 
on a flower or a green leaf, but were many times lost 
sight of in a bush or tree of dead leaves. On such oc- 
casions they were generally searched for in vain, for 
while gazing intently at the very spot where one had 
“ disappeared, it would often suddenly dart out, and 
again vanish twenty or fifty yards further on. On 
one or two occasions the insect was detected reposing, 
and it could then be seen how completely it assimilates 
itself to the surrounding leaves. It sits on a nearly 
upright twig, the wings fitting closely back to back, 
~ concealing the antennz and head, which are drawn up 
between their bases. The little tails of the hind wing 
touch the branch, and form a perfect stalk to the leaf, 
which is supported in its place by the claws of the 
middle pair of feet, which are slender and inconspicu-~ 
ous. The irregular outline of the wings gives exactly 
the perspective effect of a shrivelled leaf. We thus 
have size, colour, form, markings, and habits, all com- 
bining together to produce a disguise which may be 
