266 
HALF HOURS WITH INSECTS. [Packard. 
pale bluish green color, somewhat resembling the peculiar 
glaucous green hue of the leaf on which it feeds. It is gen¬ 
erally overlooked until the bushes are stripped. This worm 
does not seem to be eaten by birds, probably on account of 
the fluid which is suddenly poured out through the pores in 
the sides of the body when it is disturbed. The false cater¬ 
pillar of the currant saw fly is rarely eaten by birds and 
enjoys an unusual immunity; so also the pear slug (Fig. 
204) perhaps if not on account of its resemblance to a slug 
(for slugs are greedily devoured by birds), possibly on 
Fig. 204. Fig. 205. 
account of some disagreeable taste. The larva of the Cim- 
bex (Fig. 205) when coiled upon a leaf has a tolerable like¬ 
ness to the common Helix albolabris. 
Returning again to the grasshoppers, the species of the 
family of Locustarians, to which the Katydid belongs, are 
modified for a life hidden among the leaves of trees. Nearly 
all the species are green. In their youth they hop about in 
the grass, and are better protected from harm than the young 
Acrydians, which are usually dark, though some are green. 
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