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Curiosities Respecting Insects: Huber (M Huber after noticing)

M. Huber, after noticing the propagation of this industrious race, next states the accidental discovery of the very singular and unexpected consequences which follow from retarding the impregnation of the queen-bee beyond the twentieth or twenty-first day of her life. In the natural order of things, or when impregnation is not retarded, the queen begins to lay the eggs of workers forty-six hours after, and she continues for the subsequent eleven months to lay none but these; "and it is only after this period, that a considerable and uninterrupted laying of the eggs of drones commences. When, on the contrary, impregnation is retarded after the twenty-eighth day, the queen begins, from the forty-sixth hour, to lay the eggs of drones; and she lays no other kind during her whole life." It would be tedious to detail the experiments; they were numerous, and the results uniform. " I occupied myself (says M. Huber) the remainder of 1787, and the two subsequent years, with experiments on retarded fecundation, and had constantly the same results." It is undoubted, therefore, that when the course of natural instinct is retarded beyond the twentieth day, only an imperfect generation is produced; as the queen, instead of laying the eggs of workers and of males equally, will lay those of males only This discovery is entirely M. Huber's own: and so difficult is it to offer any plausible explanation of the fact, that he himself has scarcely attempted it. The working-bees had been for ages considered as entirely destitute of sex; and hence, in the writings of many authors, they are denominated neuters, but from the experiments of Schirach and Huber, it seems now to be clearly ascertained, that the workers are really of the female sex.

M Huber confirms the curious discovery of M. Schirach, that when bees are by any accident deprived of their queen, they have the power of selecting one or two grubs of workers, and of converting them into queens; and that they accomplish this by greatly enlarging the cells of those selected arvæ, by supplying them more copiously with food, and with that of a more pungent sort than is given to the common larvæ.

M. Huber gives the following curious account of the manner in which bees proceed in forming capacious cells for the workers' grubs destined to royalty.-" Bees soon become sensible of having lost their queen, and in a few hours commence the labour necessary to repair their loss. First they select the young common worms, which the requisite treatment is to convert into queens, and immediately begin with enlarging the cells where they are deposited. Their mode of proceeding is curious; and the better to illustrate it, I shall describe the labour bestowed on a single cell, which will apply to all the rest containing worms destined for queens. Having chosen a worm, they sacrifice three of the contiguous cells; next they supply it with food, and raise a cylindrical enclosure around, by which the cell becomes a perfect tube, with a rhomboidal bottom; for the parts forming the bottom are left untouched. If the bees damaged it, they would lay open three corresponding cells on the opposite surface of the comb, and consequently destroy their worms, which would be an unnecessary sacrifice, and nature has opposed it. Therefore, leaving the bottom rhomboidal, they are satisfied with raising a cylindrical tube around the worm, which, like the other cells in the comb, are horizontal. But this habitation remains suitable to the worm called to the royal state, only during the first three days of its existence: another situation is requisite for the other two days it is a worm. During that time, though so small a portion of its life, it must inhabit a cell nearly of a pyramidical figure, and hanging perpendicularly. The workers, therefore gnaw away the cells surrounding the cylindrical tube, mercilessly sacrifice their worms, and use the wax in constructing a new pyramidical tube, which they solder at right angles to the first, and work it downwards. The diameter of this pyramid decreases insensibly from the base, which is very wide, to the point. In proportion as the worm grows, the bees labour in extending the cell, and bring food, which they place before its mouth, and near its body, forming a kind of cord around it. The worm, which can move only in a spiral direction, turns incessantly to take the food before its head: it insensibly descends, and at length arrives at the orifice of the cell. Now is the time of transformation to a nymph. As any further care is unnecessary, the bees close the cell with a peculiar substance appropriated for it, and there the worm undergoes both its metamorphoses." M. Huber relates some experiments which confirm the singular discovery of M. Riems, concerning common working 66 bees that are capable of laying eggs, which, we may remark, is certainly a most convincing proof of their being of the female sex. Eggs were observed to increase in number daily, in a hive in which there were no queens of the usual appearance; but small queens considerably resemble workers, and to discriminate them, required minute inspection.

My assistant," (says M. Huber,) then offered to perform an operation that required both courage and patience, and which I could not resolve to suggest, though the same expedient had occurred to myself. He proposed to examine each bee in the hive separately, to discover whether some small queen had not insinuated herself among them, and escaped our first researches. It was necessary, therefore, to seize every one of the bees, notwithstanding their irritation, and to examine their specific character with the utmost care. This my assistant undertook, and executed with great address. Eleven days were employed in it; and, during all that time, he scarcely allowed himself any relaxation but what the relief of his eyes required. He took every bee in his hand; he attentively examined the trunk, the hind limbs, and the sting; and he found that there was not one without the characteristics of the common bee, that is, the little basket on the hind legs, the long trunk, and the straight sting."

When a supernumerary queen is produced in a hive, or is introduced into it in the course of experiment, either she or the rightful owner soon perishes. The German naturalists, Schirach and Riems, imagined that the working bees assailed the stranger, and stung her to death. Reaumur considered it as more probable, that the sceptre was made to depend on the issue of a single combat between the claimants; and this conjecture is verified by the observations of Huber. The same hostility towards rivals, and destructive vengeance against royal cells, animates all queens, whether they be virgins, or in a state of impregnation, or mothers of numerous broods. The working bees, it may here be remarked, remain quiet spectators of the destruction, by the first-hatched queen, of the remaining royal cells; they approach only to share in the plunder presented by their havock-making mistress, greedily devouring any food found at the bottom of the cells, and even sucking the fluid from the abdomen of the nymphs before they toss out the carcase.

The following fact, connected with this subject, is one of the most curious perhaps in the whole history of this wonderful insect. Whenever the workers perceive that there are two rival queens in the hive, numbers of them crowd around each; they seem to be perfectly aware of the approaching deadly conflict, and willing to prompt their Amazonian chieftains to the battle; for as often as the queens shew a disinclination to fight, or seem inclined to recede from each other, or to fly off, the bees immediately surround and detain them; but when either combatant shews a disposition to approach her antagonist, all the bees forming the clusters instantly give way, to allow her full liberty for the attack. It seems strange that those bees, who in general shew so much anxiety about the safety of their queen, should, in particular circumstances, oppose her preparations to avoid impending danger,-should seem to promote the battle, and to excite the fury of the combatants. When a queen is removed from a hive, the bees do not immediately perceive it; they continue their labours, “watch over their young, and perform all their ordinary occupations. But, in a few hours, agitation ensues; all appears a scene of tumult in the hive. A singular humming is heard; the bees desert their young, and rush over the surface of the combs with a delirious impetuosity." They have now evidently discovered that their sovereign is gone; and the rapidity with which the bad news spreads through the hive, to the opposite side of the combs, is very remarkable. On replacing the queen in the hive, tranquillity is almost instantly restored. The bees, it is worthy of notice, recognize the individual person of their own queen. If another be palmed upon them, they seize and surround her, so that she is either suffocated, or perishes by hunger; for it is very remarkable, that the workers are never known to attack a queen bee with their stings. If, however, more than eighteen hours have elapsed before the stranger queen be introduced, she has some chance to escape: the bees at first seize and confine her, but less rigidly; and they soon begin to disperse, and at length leave her to reign over a hive, in which she was at first treated as a prisoner. If twenty-four hours have elapsed, the stranger will be well received from the first, and at once admitted to the sovereignty of the hive. In short, it appears that the bees, when deprived of their queen, are thrown into great agitation; that they wait about twenty hours, apparently in hopes of her return; but that, after this interregnum, the agitation ceases, and they set about supplying their loss by beginning to construct royal cells. It is when they are in this temper, and not sooner, that a stranger queen will be graciously received; and upon her being presented to them, the royal cells, in whatever state of forwardness they may happen to be, are instantly abandoned, and the larvæ destroyed. Reaumur must therefore have mistaken the result of his own experi ments, when he asserts, that a stranger queen is instantly well received, though presented at the moment when the other is withdrawn. He had seen the bees crowding around her at the entrance of the hive, and laying their antennæ over her 2 M and this he seems to have taken for caressing. The structure of the hiver he employed prevented him from seeing further: had he used the leaf-hive, or one of similar construction, he would have perceived that the apparent caresses of the guards were only the prelude to actual imprisonment It is well known, that after the season of swarming, a general massacre of the drones is commenced. Several authors assert, in their writings, that the workers do not sting the drones to death, but merely harass them till they are banished from the hive and perish. M. Huber contrived a glass table, on which he placed several hives, and he was thus able to see distinctly what passed at the bottom of the hive, which is generally dark and concealed: he witnessed a real and furious massacre of the males, the workers thrusting their stings so deep into the bodies of the defenceless drones, that they were obliged to turn on themselves as on a pivot, before they could extricate them. The work of death commenced in all the hives much about the same time. It is not, however, by a blind or indiscriminating instinct, that the workers are impelled thus to sacrifice the males; for if a hive be deprived of its queen, no massacre of the males takes place in it, while the hottest persecution rages in all the surrounding hives. In this case, the males are allowed to survive the winter. Mr. Bonner had observed this fact; he supposed, however, that the workers thus tolerated the drones for the sake of the additional heat they generated in the hive; but we now see the true reason to be, that without them the new queen would not be fruitful. The drones are also suffered to exist in hives that possess fertile workers, but no proper queen; and, what is remarkable, they are likewise spared in hives governed by a queen whose fecundity has been retarded. Here, then, we perceive a counter-instinct opposed to that which would have impelled them to the usual massacre.

Upon the subject of swarming, M. Huber commences with an interesting account of the hatching of the queen bee. When the pupa is about to change into the perfect insect, the bees render the cover of the cell thinner, by gnawing away part of the wax; and with so much nicety do they perform this operation, that the cover at last becomes pellucid, owing to its extreme thinness. This must not only facilitate the exit of the fly, but, M. Huber remarks, it may possibly be useful in permitting the evaporation of the superabundant fluids of the nymph. After the transformation is complete, the young queens would, in common course, immediately emerge from their cells, as workers and drones do; but the bees always keep them prisoners for some days in their cells, supplying them in the mean time with honey for food; a small hole being made in the door of each cell, through which the