dilUciilt to reconcile their appearance to our pre- 

 conceived ideas of the general insect form. They 

 are nevertheless perfectly inoffensive, and feed 

 altogether on vegetables. They are, probably, 

 indebted for safety from the attacks of their ene- 

 mies the birds, to their deceptive appearance, 

 and by their general similarity in point of co- 

 lour to the object on which they rest. 



PLATE 37 & 38. 



