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TEXT-BOOK OF ENTOMOLOGY 



see by E, Fig. 195 ; and along with these the darts are also prolonged upward, 

 still held to the guides by the grooved arrangement before explained ; but both 

 guides and darts, in the upper part of their length, curve from each other some- 

 what like the arms of a Y, to the points c, c' (A, Fig. 194), where the darts 



FIG. 194. Sting of bee x 30 times : A, sting separated from its muscles ; pa, poison sac ; pg, 

 poison gland; 5lh g, 5th abdominal ganglion; n, n, nerves; e, external thin membrane joining 

 sting to last abdominal segment; ', X', /, and i', k', V , levers to move the darts; nh, sheath; /, 

 vulva ; p, sting-palpus or feeler, with tactile hairs and nerves. B and C, sections through the darts 

 and sheath, x 300 times : eh, sheath ; d, darts ; b, barbs ; p, poison-channel. />, end of a dart, 

 x 200: o, o, openings for poison to escape into the wound. After Cheshire. 



