THE ANIMAL KINGDOM. 87 



lies that we can only make them ont by their fundamental 

 characteristics. There are even frequently extreme differ- 

 ences between the male and the female. 



Some insects possess such an abnormal exterior that they 

 exactly resemble leaves of trees, having the same venation 

 and coloring ; when they are at rest we might take them 



34. The Mormolyce phyllodes (natural size). 



for leaves, and even the greedy bird is deceived by them. 

 This is the case with some MormolycoB. In them it is the 

 wings that are transformed into green membranes, which 

 give the animal the appearance of an animated leaf. 



Some insects again are remarkable from the strangeness, 

 not to say grotesqueness, of their aspect, especially, for in- 

 stance, the Membraceae, the corselets of which are studded 



