170 FLASHLIGHTS ON NATT 



The large kidney-shaped bodies on either side of 

 tlu- 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 tin- 

 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 THE MOUTH CLOSING : TONGUE WITHDRAWN : BACK VIEW.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 mam 

 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 



