STINGS OF INSECTS. 



G19 



two barbed darts, which will penetrate the flesh deeply, 

 9Jid, 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 



1 Bting of W;isr. '^, sting of Bfc- (The small circles show each nearly tho 

 * full size.) 



