NO. 9 



OLFACTORY SENSE OF INSECTS — McINDOO 



25 



Fig. I.— Antennal organs of the honey bee copied from Schenk. A an 

 antennal joint of a drone, showing a few of the many pore plates {rory ) 

 and a group of Forel's flasks (FFl), x 150; B, pore plates and Forel s flasks 

 from a drone's antenna, x 600; C, pore plates (PorPl), pegs (Pg), and tactile 

 hairs (THr) from a worker's antenna, x 600; D, internal anatomy of a pore 

 plate and of a tactile hair ; E, the same of a peg ; F, the same of a tactile hair ; 

 G, the same of a Forel's flask; H, the internal anatomy of a pit peg. D-H, 

 X 600. 



