134 



Beekeeping 



entirely occupied by large muscles for the movement of the 

 wings. The abdomen contains the greater part of the 

 alimentary canal, the reproductive organs and large air 

 sacs. It will of course be understood that the functions 

 of these three main parts are not confined to those named. 

 The tracheal sacs extend into the thorax and head, the 

 nervous system extends along the central side of the thorax 

 and abdomen. 



Head. 



On the head are located numerous sense organs, the dis- 

 cussion of which is reserved for a later chapter. Aside 



Vx 



ten 



PrbFs 



A - 



FIG. 68. Front (A) and back (E) views of head of worker bee with 

 the mouth parts cut off near their bases. 



from these, the most interesting features are the complex 

 mouth parts. The general appearance of the head of a 

 worker bee (with all the hairs removed) is shown in the 

 accompanying figure (Fig. 68, A and B). It is roughly 

 triangular with the apex below, where the mouth parts 

 are situated. The sides are rounded out by the compound 

 eves (E). From front to back, the head is flattened and 



