Drone Peculiarities, 



lOI 



Landois showed many years since, that the hum of bees 

 and other insects, was due first to vibrations of wings, sec- 

 ondly to vibrations of the abdominal rings and, thirdly, to 

 what he styled true voice in the thoracic spiracles, where 

 there are cavities which he thought were voice cavities. 

 He thought the humming tone of bees and other insects, 

 came from the spiracles. The drone's flight is more heavy 

 and lumbering than that of the workers. Their ligula ( Fig. 

 8),labial palpi and maxillae — like thesame in thequeen bee — 



Fig. 29. 



Fig. 30. 



Drone Bees, magnified. 



are short, while their jaws (Fig. 42, a) possess the rudi- 

 mentary tooth, and are much the same in form as those of 

 the queen, but are heavier, though not so strong as those 

 of the workers. Their eyes (Fig. S), are very prominent, 

 meet above, and thus the simple eyes are thrown forward. 



