RESEMBLANCES AMONG ANIMALS, 57 
concentricus) is found only at Pard, on a distinct 
species of tree, the bark of which it resembles with 
equal accuracy. Both these insects are abundant, and 
we may fairly conclude that the protection they derive 
from this strange concealment is at least one of the 
causes that enable the race to flourish. 
Many of the. species of Cicindela, or tiger beetle, 
will illustrate this mode of protection. Our common 
Cicindela campestris frequents grassy banks, and is 
of a beautiful green colour, while C. maritima, which 
is found only on sandy sea-shores, is of a pale bronzy 
yellow, so as to be almost invisible.’ A great number 
of the species found by myself in the Malay islands 
are similarly protected. The beautiful Cicindela glo- 
-riosa, of a very deep velvety green colour, was only 
taken upon wet mossy stones in the bed of a moun- 
tain stream, where it was with the greatest difficulty- 
detected. A large brown species (C. heros) was found 
chiefly on dead leaves in forest paths; and one which 
was never seen except on the wet mud of salt marshes 
was of a glossy olive so exactly the colour of the mud 
as only to be distinguished when the sun shone, by its 
shadow! Where the sandy beach was coralline and 
nearly white, I found a very pale Cicindela ; wherever 
it was volcanic and black, a dark species of the same 
’ . genus was sure to be met with. 
There are in the East small beetles of the family 
Buprestidse which generally rest on the midrib of a 
leaf, and ‘the naturalist often hesitates before picking 
them off, so closely do they resemble pieces of bird’s 
