3 2 



BEES AND BEE-KEEPING. 



(N, Fig. 4), or in the cross section of imago (Fig. 8). 

 The drone is similarly formed, but has seven belts 

 or rings. These, in both cases, if the specimens are 

 living, are continually slipping in and out upon 

 each other like the joints of a telescope, their attach- 



Fig. 6.— Air Sac and Tracheae (Magnified Fifty Times). 



a, Air Sac, showing Plaiting ; 6, Spiral Threads of Trachea ; c, Interior, showing 

 threads ; d, Single Thread from Small Trachea; e, Fine Tracheae. 



ments being made by delicate membranes, which 

 admit of free movement (abdomen, Plate I.). As 

 these slide backwards and forwards, we catch sight 

 of depressions that are hidden from view when the 

 abdomen is fully drawn in, one occurring near each 



