Plate VII. 



Details of Sting of Bee. 



B, Darts, Sheath, and Valves— p.b. Poison Bag Duct; fo. Fork; s, Slide Piece; 

 va, Valve ; b, Barbs. F, Terminal Abdominal Segments—?!', Worker's Sting ; 

 g, Queen's Sting; r and r 1 . Anal Plate. G, Sting Entering Skin— sh, Sheath; 

 a, b, o, Positions in First, Second, and Third Thrusts with Sting. H, Poison 

 Gland, magnified 300 times — en, Cell Nucleus ; n, Nerve ; g, Ganglionic Cell. 

 I, Poison "Gland, Cells Removed— erf, Central Duct; d, Individual Small 

 Ducts ; pr, Propria. K, Gland of Formica Rufa — cd, Central Duct ; d, Small 

 Ducts ; to, Secreting Cells. L, Valve and Support, much magnified— t, 

 Trachea ; va, Valve ; tr, Truss or Valve Prop. 



