22 
THE HEAD OF THE BEE. 
power of 400 diameters^ it will be seen that the 
antennae are covered with hairs, which are very close 
on the terminal joints, and that they possess other 
organic structures, which we shall refer to in another 
chapter. 
Collectively, the organs of the mouth are called 
trophi (Figs. 9 and 10). 
They consist of the lahrurii (Fig. 9, r), or upper 
lip ; the epipharynx (Fig. 9, .y), or gum flap ; the 
These parts are single ; those in pairs being the 
7 nandibles (Fig. p p) the maxillce (Fig. 10, h) ; 
the maxillary palpi (Fig. 10, i) \ the labial palpi (Fig. 
10, /), and the paraglossce (Fig. 10, ?i). 
The labrum, which is provided with a row of 
simple hairs along its edge in the queen and worker 
and tufted hairs in the drone, is attached by a joint to 
the clypeus (Fig. 9, c)^ has a vertical motion, and falls 
over the organs beneath it when in repose, and it is 
then itself covered by the mandibles. 
The mandibles {inandibidce) or jaws of bees, which 
are placed on each side of the labrum, move laterally. 
They are smooth and sharp along the edge in the 
worker (Fig. 9,/ /, and Fig. 63, b), but are notched 
Fig. 9. 
c 
pharynx.^ or gullet, which 
forms the true mouth and 
entrance to the oesophagus ; 
the labiiuji., or under lip, 
which is formed of several 
parts, of which one is the 
ligula (Fig. 10, ^), or true 
tongue. 
