320 



N. E. McINDOO 



hair sockets are represented in this drawing, the difficulty of 

 observation would be appreciated. 



From the above it is seen that the superficial appearance of 

 an olfactory pore is that of a small round or oblong bright area 

 that has a dark boundary and a round, oblong, or slitlike trans- 



6pfir- 



Por/lpMr 



'^/>^''' Bri>Hr 



Fig. 15 Diagram of a longitudinal transverse view of the trochanter and a 

 small portion of the femur from the third leg of a worker bee, showing the loca- 

 tion of the olfactory pores on the outer surface as indicated by the numbers 6 

 to 9; also the hairs and the anatomy of the leg are shown. 



parent opening. Outside the boundary there is a comparatively 

 dark border, and inside the border the chitin is very light in 

 color. The aperture, according to its shape, may be likened to 

 a round, slightly flattened, or considerably flattened funnel. 



Internal structure 



A typical olfactory pore of the honey bee is an inverted flask- 

 like structure in which the bottom of the flask forms the exter- 

 nal covering or chitinous layer (fig. 16, A, ChL) of the pore. 

 This layer contains the pore aperture (PorAp). The neck (NkFl) 

 of the flask is wide and the mouth {MF) is flaring. About two- 

 thirds of the space at the bottom of the flask is occupied by a 

 chitinous cone (Con). The cone is not separated from the walls 



