THORAX, LEGS, AND WINGS, 
35 
The operation may be frequently observed, and it 
would be noticed that the antenna on the right side 
is cleaned by this device on the left leg, and the left 
antenna by that of the right leg. 
The remaining joints are provided with brushing 
hairs, and on the last, surrounding the claws, are long 
tactile hairs (Fig. 17, 0 0). These legs are similar 
both in the drone and queen, but the former has a 
number of feathered hairs on the digiti, or small joints 
of the tarsus. 
In the second, or intermediate pair of legs of the 
worker, the sinus is absent, and instead of the velum, 
the tibia is provided with a spur or spine (Fig. 16, b,/). 
Various guesses have been made as to its use, some 
supposing it was meant for removing the wax scales 
from beneath the abdominal rings ; other fertile 
imaginations have stated it to be a tool for removing 
the pollen from the pollen baskets ; but as it is found 
both in the drone and queen equally well developed, 
it being useless to them for this purpose, another 
idea, that of its being used as a collateral support, is 
a much more reasonable one (Shuckard, 152). An- 
other statement has been made that it was for cleaning 
the wings, but it is far too short for this purpose. 
The third pair, or posterior legs of the worker, 
serve as gatherers and carriers of pollen. The upper 
joints (Fig. 15, a, b, c) are covered with long feathery 
hairs. The tibia (a and b, d) is specially constructed 
for the conveyance of pollen and propolis, by being 
framed externally like a little basket, or corbicula. It 
is smooth, and hollowed longitudinally, and the lateral 
