64 
THE SENSES OF EEF.S. 
sary for their being hatched, the heat will of course 
penetrate to the other side, and some portion of it 
would be wasted if the cells on that side were either 
empty, or filled only with honey. But when both 
sides are filled with brood, and covered with hive-bees, 
the heat is confined to the spot where it is necessary, 
and is turned to full account in bringing the young to 
maturity. See PI. XII. Fig. 1, in which a, b, c, repre- 
sent that part of tho comb in an experimental hive 
where the observation was made, which w r as filled with 
brood, the rest of the square being, with the exception 
of the uncoloured part, sealed honey. On the opposite 
side, the brood comb was exactly of the same figure, 
insomuch, that on the narrowest inspection, I could 
hardly discern one cell which contained brood while 
its opposite contained honey. PI. VI. exhibits a Royal 
Cell, c, containing a larva nearly ready to be sealed 
up ; /, form of the Royal Cell at the time of the egg 
being deposited in it; g, ditto, when sealed, and just 
beforo hatching tabes place ; i, ditto, after the young 
Queen has been hatched ; h, ditto, with a ragged open- 
ing in the broadside through which the doad body of 
a young Queen, destroyed by the Queen regnant, has 
been dragged out by the bees. 
The mutual aversion of Queens is a striking feature 
in the natural history of this insect; and though not 
perhaps strictly in place, one extraordinary effect of 
it may be mentioned here. Their mutual enmity 
may be truly said to be an in born disposition with 
them, for no sooner has the first of the race, in a 
hive about to throw off a second swarm, escaped 
from her own cradle, than she hurries away in search 
