1 70 FLASHLIGHTS ON NATURE 



The large kidney-shaped bodies on either side of 

 the head (here seen as interrupted by the antennae 

 or feelers) are the compound eyes, each of which 

 consists of innumerable tiny lenses, giving the 

 wasp that possesses them a very acute sense of 

 vision. We do not know exactly what is the 

 difference in use between the simple eyes and the 



NO . 9. THE MOUTH CLOSING: TONGUE WITHDRAWN : BACK VIEW. 



compound ones ; but either sort has doubtless its 

 own special part to play in this complex personality. 

 The antennae, or feelers, again, with their many 

 joints and their ball-and-socket base, are beautiful 

 and wonderful objects. The various parts of the 

 mouth are here seen open ; conspicuous among 

 them are the great saw-like outer jaws, used for 



