56 



ELEMEXTARY STUDIES IX IXSECT 'LIFE 



The muscles, though invisible to the eye, are yet 

 strong enough to force the sting, to the depth of one- 

 twelfth of an inch, through the thick skin of a man's 

 hand. 



> 



FIG. 47. A walking-stick, protected by its re- 

 semblance to its surroundings. 



FIG. 48. Leaf butterfly (Kal- 

 lima paralecta) on left, showing 

 protective resemblance to leaf 

 on right. (After Wallace.) 



Sympathetic Coloration. So far we have spoken only 

 of active means brought into use hy insects in pro- 

 tecting themselves. Did yon ever notice that the grass- 

 hoppers which live along the roadway and those living 



