INSECT WEAPONS AND TOOLS 187 



Fig. 123 gives another view of the mouth organs 

 of the gad-fly, and this will Ije seen to differ from 

 hlg. 120 by the addition of the large dark organ 

 occupying the central position. This, which in 



M.iHniliwl puiiii of t;ail-fl^'s li'.uu 



the former figure was rcmo\'ed for the sake of 

 clearness, represents the lahiiuii or lower lip 

 of the insect. There are two suckerdike pads 

 or lobes at its end, which spread out upon the 

 flesh of the victim, and so retain a firm hold 



