Color and Pattern and their Uses 
6o 3 
these larvae are, they are only occasionally seen, and then usually when “ loop¬ 
ing” along on the ground or sidewalk. When in their habitual haunts in 
trees and bushes, the slightest disturbance, as the approach of bird or lizard 
or human observer, causes them to “go stiff,” holding the body (Fig. 789) 
Fig. 789. 
Fig. 790. 
Fig. 789.—An inch-worm, larva of geometrid moth, in protective position. (After Jor¬ 
dan and Kellogg; natural size.) 
Fig. 790.—The walking-stick, or twig-insect, Diapheromera Jemorata. (Slightly enlarged.) 
rigidly out from the branch or stem to which they cling by the posterior 
two pairs of prop-legs, and looking so like a short twig, or broken one, that 
they are only rarely recognized for what they really are. The skin is brown or 
