9 6 



FIELD ZOOLOGY. 



be resting while feeding is one of the most effective cases 

 of protective coloration and mimicry of form. These 

 insects, as might be suspected, are tree-dwellers, living 

 also on bushes or other vegetation, and keeping as close 



FIG. 43,Diapheromcra veliei, on a twig. Natural size. (Folsom.) 



as possible to the twigs of the plant. The species gener- 

 ally found is brown and very slender-bodied; but occa- 

 sionally there is found a green species with a slightly 

 stouter body. And whenever one is fortunate enough 

 to discover the brown species on the twig, or the green 



