STINGS OP INSECTS. 



619 



tw) barbed darts, which will penetrate the flesh deeply, 

 and, from a peculiar arrangement of their serrated edges, 

 their immediate withdrawal is prevented ; by the great 

 muscular effort required for this purpose, a small sac or 



Fig. 279. 



1, Btlng of Wasp. 2, Sting of Bee (The small circles show each nearly th. 



full size.) 



