WALKING-STICKS AND WALKING-LEAVES. 59 



to distinguish, in every case, the larvce from the adults. 

 We can only affirm that, as often as the elytrum or the 

 wing is separate and articulated, the individual is an 

 adult. In a great number of the apterous species it is 

 often quite impossible to distinguish the larvce and 

 nymphs from the perfect insects. 



