DEVELOPMENT OF THE BEE'S STING 



173 



Fifi. 192. Base of the ovipositor of Locustd rii'iiUxniiiia seen from beneath : c', sheath, or 

 outer and lower pair of stylets turned to one side to show the others ; />', upper and inner pair ; b", 

 third or innermost, smallest pair of stylets. A, the same on one side, in section. The shaded 

 parts show the muscular attachments. The muscles which extend the apparatus and are attached 

 to v , S, and ij, as also the membranes which unite the pieces from j to y with each other and the body, 

 are removed, so that only the chitinous parts remain. After Dewitz. 



D 



FIG. 193. Development of the sting in Bombus : A, a, 1st pair on Sth sternite ; b, 2d inner 

 pair forming the darts ; c. outer pair. B-E, more advanced stages. F, a 1 , y, e, three pairs of 

 tubercles, the germs of the male organs. 



