CATERPILLARS. 
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green caterpillars of the swiftest Swallow-tails, of the Four- 
tailed Pashas, called Char axes, and of the beautiful and 
wary Euthalias. How motionless they lie on the upper 
side of a leaf! Motionless, because spiders attack nothing 
unless it moves ; on the upper side of the leaf, because that 
is the outward side 
to birds among the 
twigs. At long in- 
tervals they wander 
away to feed. 
Char axes imna ap- 
pears to feed only 
once in the twenty- 
four hours, and 
Papilio sarpedon 
feeds by night. 
Then there are 
offensive weapons 
and defensiveworks. ichneumon fly. 
Some are armed with spines, or bristles, or stinging hairs, 
and these enjoy security to a certain extent ; but in this 
war every move is met by a countermove, and there is 
no such thing as final safety. I once saw a large, hairy 
