Anatomy oj Bee's Sting. 133 



lancets (Fig. 51, /, /") or through the central tubes (Fig. 



51, ^^1 between the three spears. 



The lancets are held to the central piece by projections 

 (Fig. 51. T, T) from the latter, which fit into correspond- 

 ing grooves (Fig. 51, Z" ) of the lancets. In the figure 

 the lancets are moved one side to show the barbs and valves; 

 normally they are held close together, and thus form the 

 lube (Fig. 51, N). 



At the base of the central awl two flexible arms (Fig. 



52, b b ) run out and up, where they articulate with 



Fig. 52. 



sting of Worker Bee, modified from Hyatt and Bryant, 



Strong levers (Fig. 52, Z>, Z?). The two lancets are sim- 

 ularly curved and closely joined to the flexible arms by the 

 same dove-tailed groove and projection already described. 

 These lancets connect at their ends (Fig. 52, c, c) with 

 heavy triangular levers (Fig. 53, ^, i?), and these in turn 

 with both C and D atj and s. All of these levers, which 

 also serve as fulcra (Fig. 52, B, C and D), are very broad 

 and so give great space for muscular attachment (Fig. 52, 

 m). These muscles, by action, serve to compress the 

 poison sac, also cause the lever (Fig. $2,B) to rotate about 



