io4 



BEES AND BEE-KEEPING. 



joints are well clothed with hairs, but otherwise ^ are 

 dissimilar to one another, and to the remaining eight, 

 these last having a common structure of a highly 

 complicated character. The joints are not telescopic, 

 but are articulated (as at B, Fig 20), with a central 

 opening between each, whose width is rather less 

 than half of their total diameter. They have only 



Fig. 20.— Longitudinal Section of Drone Antenna, Nerve Structures 

 removed (Magnified Twenty times). 



sc, Scape ; fl, Flagellum ; 1, 2, 3, &c. No. of Joints : af, Antennary Fossa, or 

 Hollow ; tr, Trachea ; m, Soft Membi-ane ; wh, Webbed Hairs ; lm, Levator 

 Muscle ; dm, Depressor Muscle. B, Small Portion of Flagellum (Magnified 

 Sixty times) — n, Nerve ; a, Articulation, or Joint. 



very slight relative movement, and this is brought 

 about by contractile connections (a, B). If the eight 

 joints referred to be examined by the microscope, it 

 will be seen at once that the front and back faces are 

 totally unlike. The back is sparsely covered by 

 regularly placed hairs, somewhat curved, and pointing 

 downwards, whilst here and there hairs larger and 

 quite straight are seen (c 1 , B, Fig. 22). The front 

 is similarly furnished, but the spaces between the 

 hairs are here filled with oval discs, depressed in the 



