The population of a hive is very small during the winter in comparison with the vast numbers gathering produce in the summer—produce which they themselves live to enjoy but for a short period. So that not only, as of old, may lessons of industry be learned from bees, but they also teach self-denial to mankind, since they labour for the community rather than for themselves. Dr. Bevan, in describing the age of bees, thus adapts the well-known lines of Homer in allusion to the fleeting generations of men:—
"Like leaves on trees the race of bees is found,
Now green in youth, now withering on the ground;
Another race the spring or fall supplies,
They droop successive, and successive rise."
With regard to the functions of worker bees, Huber supposed that there were two distinct classes, one acting as gatherers of store and the other as nurses of brood. This however has been demonstrated to be a mistake, for the distinction is not one of class, but simply of age, the younger workers, for the first two or three weeks of their existence,[7] assuming the whole of the inner or home occupations—viz., those of feeding the larvæ, the queen, and the drones, and of making wax, building comb, and closing the cells, as well as keeping the hive in a state of cleanliness—and these duties they retain until themselves sufficiently vigorous to range the fields in quest of supplies. After this term of apprenticeship they enter upon the labours of adult bees, and collect honey, pollen, and propolis—particulars as to which functions, and that of wax secretion, will be found in the third and fourth sections of our next chapter, and in the sections devoted to these four items in Chapter VI. Water and salt are also brought in to aid in the sustenance of the young brood. The older bees perform the duties of the younger when there are none or insufficient of the latter in the hive; but they will hang about perfectly idle if kept at home by weather when there is a full staff of their younger sisters. These last, on the contrary, cannot possibly supply the places of the older until at the very least they have attained their eleventh or twelfth day.
[7] German observations cited by Von Berlepsch give from ten to nineteen days. The Baron gives provisionally the sixteenth day as the rule. The first sporting before the hive is given at from the fourth to the tenth day.
Another of the varied duties performed by the younger worker bees is that of ventilating the hive by fanning with their wings. On a warm day a number of them may be seen located outside on the alighting-board working these appendages at the utmost velocity so as to drive a current of pure air within; while inside, but not exactly opposite to their comrades, are another troop, who by the same process are engaged in driving the foul air out. Other detachments are in the hottest weather posted in different parts of the interior, and the whole relieve each other in pickets. Huber ascertained that the inside air of a hive is thus preserved nearly as pure as that without.
In older works on the subject we are told of the sentinels of bees, but this idea is now abandoned as a fiction. It arose naturally enough out of the above office of fanners, as well as from the fact that if a rap be given upon the alighting-board a bee will immediately appear without. So too if danger appears, and if any bees are outside either as fanners or for their own relief from the heat, these will promptly perform the duties of sentinels. But as to any of them being posted specially for that purpose, it is sufficient to say that at the season when enemies are most to be feared there are no guards at the gates to be found.
It has been much queried whether bees ever go to sleep during the working season, as it is known that at night, when not gathering abroad, they are engaged in ceaseless activity at home. Huber, however, observed frequent instances of bees placing their heads' in empty cells and remaining perfectly motionless in that position for from fifteen to twenty-five minutes, in his opinion evidently asleep. Von Berlepsch has repeatedly observed similar occurrences both with workers and queens—not with drones, but then, says he, what is the whole life of these but sleep?—and he considers that there can exist upon the point no doubt whatever. "The more active the bees are," he remarks, "the more will they sleep, like every creature."