THE HEAD OF THE BEE AND ITS APPENDAGES. 



29 



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regions of the bee's head may be named according to the sclerites with 

 which they correspond in other insects. Thus, the part of the face 

 above the clypeus and between the compound eyes may be called the 

 front (fig. 9A, Ft),ihQ, parts below the compound eyes the geruE {Ge)^ 

 and the top of the head the vertex 

 (Vx). The area on the back of the 

 head around the foramen magnum 

 may likewise be termed the occipital 

 region (fig. 9B, Oc) and the parts be- 

 hind the gena? and the lower halves 

 of the compound eyes the postgencB 



(Pge). 



The worker, queen, and drone differ 

 conspicuously in the shape and size of 

 the head, as will be seen by comparing 

 A, B, and C of figure 10. In these 

 drawings the front has been removed 

 in order to show various internal 

 parts, which will be described later. 

 Wliile the head of the worker (A) is 

 triangular in facial view, that of the 

 queen (B) is more rounded and wider 

 in proportion to its length. The head 

 of the drone (C) is much larger than 

 that of the female and is nearly cir- 

 cular in outline. In shape the head 

 of the queen is intermediate between 

 that of the worker and that of the 

 drone, but in size it is somewhat 

 smaller than the head of the worker. 

 The ej^es (E) of the worker and queen 

 are about equal, but those of the drone 

 are enormously enlarged and are 

 broadly contiguous on the vertex and 

 the upper part of the front. On this 

 account the ocelli (6^) of the drone are 

 crowded down on the front nearer the 

 bases of the antenna* and the front 

 itself is very much narrowed above. 

 The antennne of the drone consist of 

 13 segments, while those of the females 

 have but 12 segments. The mandibles are largest proportionatel}^ in 

 the queen and are very small in the drone. Those of the worker have 

 a smooth terminal edge, while this edge is notched in the queen and 

 the drone. The parts of the proboscis are much longer in the worker 



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Fig. 10. — A, anterior view of head of 

 worker, with front, antennro, and 

 proboscis removed ; n, correspond- 

 ing view of head of queen ; 0, same 

 of di'one. 



