UNDER THE APPLE-TREES 
their nests. They know to perfection the art of 
make-believe. The males of bumblebees and wasps 
when caught will imitate perfectly the action of a 
bee when it thrusts its stinger into your hand. 
The look of frightfulness which certain caterpil- 
lars take on often, in the shape of two fierce coun- 
terfeit eyes, is only a mask to scare the unsophisti- 
cated birds. At least experiment seems to prove 
that this is the case. The caterpillars of some of the 
hawk-moths wear this frightful mask. These insects 
can so retract their heads and front segments as to 
give an increased look of fearfulness. Weismann 
found that certain small birds were afraid of them. 
When one insect mimics another for the purpose 
of protection, as is now generally believed to be the 
case among a number of butterflies, such insect is 
sailing under false colors. There is perhaps more 
masquerading in nature than we wot of, and yet it 
is all natural. 
