INSECT WEAPONS AND TOOLS 185 



apparatus which is contained in the proboscis or 

 trunk of the gad-fly. The organs with the sharp 

 points, of which there are two, are the blades 



Hg. 1 20, 



ickers of the gad-fly 



which lance the hides of the unfortunate victims. 

 The tip of one of these is illustrated, much 

 more highly magnified in Fig. 121, showing 

 what lance- like objects they really are. When 



