Bramble-Bees and Others Part 17

And behold, to-day, the ignoramus of three months ago knows the peril, knows it well, without serving any apprentices.h.i.+p. Every stranger who appears is kept at a distance, without distinction of size or race.

If the threatening gesture be not enough, the keeper sallies forth and flings herself upon the persistent one. Cowardice has developed into courage.

How has this change been brought about? I should like to picture the Halictus gaining wisdom from the misfortunes of the spring and capable thenceforth of looking out for danger; I would gladly credit her with having learnt in the stern school of experience the advantages of a patrol. I must give up the idea. If, by dint of gradual little acts of progress, the Bee has achieved the glorious invention of a janitress, how comes it that the fear of thieves is intermittent? It is true that, being by herself in May, she cannot stand permanently at her door: the business of the house takes precedence of everything else. But she ought, at any rate as soon as her offspring are victimized, to know the parasite and give chase when, at every moment, she finds her almost under her feet and even in her house. Yet she pays no attention to her.

The bitter experience of her ancestors, therefore, has bequeathed nothing to her of a nature to alter her placid character; nor have her own tribulations aught to do with the sudden awakening of her vigilance in July. Like ourselves, animals have their joys and their sorrows.

They eagerly make the most of the former; they fret but little about the latter, which, when all is said, is the best way of achieving a purely animal enjoyment of life. To mitigate these troubles and protect the progeny there is the inspiration of instinct, which is able without the counsels of experience to give the Halicti a portress.

When the victualling is finished, when the Halicti no longer sally forth on harvesting intent nor return all befloured with their spoils, the old Bee is still at her post, vigilant as ever. The final preparations for the brood are made below; the cells are closed. The door will be kept until everything is finished. Then grandmother and mothers leave the house. Exhausted by the performance of their duty, they go, somewhere or other, to die.

In September appears the second generation, comprising both males and females. I find both s.e.xes wa.s.sailing on the flowers, especially the Compositae, the centauries and thistles. They are not harvesting now: they are refres.h.i.+ng themselves, holding high holiday, teasing one another. It is the wedding-time. Yet another fortnight and the males will disappear, henceforth useless. The part of the idlers is played.

Only the industrious ones remain, the impregnated females, who go through the winter and set to work in April.

I do not know their exact haunt during the inclement season. I expected them to return to their native burrow, an excellent dwelling for the winter, one would think. Excavations made in January showed me my mistake. The old homes are empty, are falling to pieces owing to the prolonged effect of the rains. The Zebra Halictus has something better than these muddy hovels: she has snug corners in the stone-heaps, hiding-places in the sunny walls and many other convenient habitations.

And so the natives of a village become scattered far and wide.

In April, the scattered ones rea.s.semble from all directions. On the well-flattened garden-paths a choice is made of the site for their common labours. Operations soon begin. Close to the first who bores her shaft there is soon a second one busy with hers; a third arrives, followed by another and others yet, until the little mounds often touch one another, while at times they number as many as fifty on a surface of less than a square yard.

One would be inclined, at first sight, to say that these groups are accounted for by the insect's recollection of its birthplace, by the fact that the villagers, after dispersing during the winter, return to their hamlet. But it is not thus that things happen: the Halictus scorns to-day the place that once suited her. I never see her occupy the same patch of ground for two years in succession. Each spring she needs new quarters. And there are plenty of them.

Can this mustering of the Halicti be due to a wish to resume the old intercourse with their friends and relations? Do the natives of the same burrow, of the same hamlet, recognize one another? Are they inclined to do their work among themselves rather than in the company of strangers?

There is nothing to prove it, nor is there anything to disprove it.

Either for this reason or for others, the Halictus likes to keep with her neighbours.

This propensity is pretty frequent among peace-lovers, who, needing little nourishment, have no cause to fear compet.i.tion. The others, the big eaters, take possession of estates, of hunting-grounds from which their fellows are excluded. Ask a Wolf his opinion of a brother Wolf poaching on his preserves. Man himself, the chief of consumers, makes for himself frontiers armed with artillery; he sets up posts at the foot of which one says to the other:

'Here's my side, there's yours. That's enough: now we'll pepper each other.'

And the rattle of the latest explosives ends the colloquy.

Happy are the peace-lovers. What do they gain by their mustering? With them it is not a defensive system, a concerted effort to ward off the common foe. The Halictus does not care about her neighbour's affairs.

She does not visit another's burrow; she does not allow others to visit hers. She has her tribulations, which she endures alone; she is indifferent to the tribulations of her kind. She stands aloof from the strife of her fellows. Let each mind her own business and leave things at that.

But company has its attractions. He lives twice who watches the life of others. Individual activity gains by the sight of the general activity; the animation of each one derives fresh warmth from the fire of the universal animation. To see one's neighbours at work stimulates one's rivalry. And work is the great delight, the real satisfaction that gives some value to life. The Halictus knows this well and a.s.sembles in her numbers that she may work all the better.

Sometimes she a.s.sembles in such mult.i.tudes and over such extents of ground as to suggest our own colossal swarms. Babylon and Memphis, Rome and Carthage, London and Paris, those frantic hives, occur to our mind if we can manage to forget comparative dimensions and see a Cyclopean pile in a pinch of earth.

It was in February. The almond-tree was in blossom. A sudden rush of sap had given the tree new life; its boughs, all black and desolate, seemingly dead, were becoming a glorious dome of snowy satin. I have always loved this magic of the awakening spring, this smile of the first flowers against the gloomy bareness of the bark.

And so I was walking across the fields, gazing at the almond-trees'

carnival. Others were before me. An Osmia in a black velvet bodice and a red woollen skirt, the Horned Osmia, was visiting the flowers, dipping into each pink eye in search of a honeyed tear. A very small and very modestly-dressed Halictus, much busier and in far greater numbers, was flitting silently from blossom to blossom. Official science calls her Halictus malachurus, K. The pretty little Bee's G.o.dfather strikes me as ill-inspired. What has malachurus, calling attention to the softness of the rump, to do in this connection? The name of Early Halictus would better describe the almond-tree's little visitor.

None of the melliferous clan, in my neighbourhood at least, is stirring as early as she is. She digs her burrows in February, an inclement month, subject to sudden returns of frost. When none as yet, even among her near kinswomen, dares to sally forth from winter-quarters, she pluckily goes to work, s.h.i.+ne the sun ever so little. Like the Zebra Halictus, she has two generations a year, one in spring and one in summer; like her, too, she settles by preference in the hard ruts of the country roads.

Her mole-hills, those humble mounds any two of which would go easily into a Hen's egg, rise innumerous in my path, the path by the almond-trees which is the happy hunting-ground of my curiosity to-day.

This path is a ribbon of road three paces wide, worn into ruts by the Mule's hoofs and the wheels of the farm-carts. A coppice of holm-oaks shelters it from the north wind. In this Eden with its well-caked soil, its warmth and quiet, the little Halictus has multiplied her mole-hills to such a degree that I cannot take a step without crus.h.i.+ng some of them. The accident is not serious: the miner, safe underground, will be able to scramble up the crumbling sides of the mine and repair the threshold of the trampled home.

I make a point of measuring the density of the population. I count from forty to sixty mole-hills on a surface of one square yard. The encampment is three paces wide and stretches over nearly three-quarters of a mile. How many Halicti are there in this Babylon? I do not venture to make the calculation.

Speaking of the Zebra Halictus, I used the words hamlet, village, towns.h.i.+p; and the expressions were appropriate. Here the term city hardly meets the case. And what reason can we allege for these innumerable cl.u.s.ters? I can see but one: the charm of living together, which is the origin of society. Like mingles with like, without the rendering of any mutual service; and this is enough to summon the Early Halictus to the same way-side, even as the Herring and the Sardine a.s.semble in the same waters.

CHAPTER 14. THE HALICTI: PARTHENOGENESIS.

The Halictus opens up another question, connected with one of life's obscurest problems. Let us go back five-and-twenty years. I am living at Orange. My house stands alone among the fields. On the other side of the wall enclosing our yard, which faces due south, is a narrow path overgrown with couch-gra.s.s. The sun beats full upon it; and the glare reflected from the whitewash of the wall turns it into a little tropical corner, shut off from the rude gusts of the north-west wind.

Here the Cats come to take their afternoon nap, with their eyes half-closed; here the children come, with Bull, the House-dog; here also come the haymakers, at the hottest time of the day, to sit and take their meal and whet their scythes in the shade of the plane-tree; here the women pa.s.s up and down with their rakes, after the hay-harvest, to glean what they can on the n.i.g.g.ardly carpet of the shorn meadow. It is therefore a very much frequented footpath, were it only because of the coming and going of our household: a thoroughfare ill-suited, one would think, to the peaceful operations of a Bee; and nevertheless it is such a very warm and sheltered spot and the soil is so favourable that every year I see the Cylindrical Halictus (H. cylindricus, FAB.) hand down the site from one generation to the next. It is true that the very matutinal, even partly nocturnal character of the work makes the insect suffer less inconvenience from the traffic.

The burrows cover an extent of some ten square yards, and their mounds, which often come near enough to touch, average a distance of four inches at the most from one another. Their number is therefore something like a thousand. The ground just here is very rough, consisting of stones and dust mixed with a little mould and held together by the closely interwoven roots of the couch-gra.s.s. But, owing to its nature, it is thoroughly well drained, a condition always in request among Bees and Wasps that have underground cells.

Let us forget for a moment what the Zebra Halictus and the Early Halictus have taught us. At the risk of repeating myself a little, I will relate what I observed during my first investigations. The Cylindrical Halictus works in May. Except among the social species, such as Common Wasps, b.u.mble-bees, Ants and Hive-bees, it is the rule for each insect that victuals its nests either with honey or game to work by itself at constructing the home of its grubs. Among insects of the same species there is often neighbours.h.i.+p; but their labours are individual and not the result of co-operation. For instance, the Cricket-hunters, the Yellow-winged Sphex, settle in gangs at the foot of a sandstone cliff, but each digs her own burrow and would not suffer a neighbour to come and help in piercing the home.

In the case of the Anthophorae, an innumerable swarm takes possession of a sun-scorched crag, each Bee digging her own gallery and jealously excluding any of her fellows who might venture to come to the entrance of her hole. The Three-p.r.o.nged Osmia, when boring the bramble-stalk tunnel in which her cells are to be stacked, gives a warm reception to any Osmia that dares set foot upon her property.

Let one of the Odyneri who make their homes in a road-side bank mistake the door and enter her neighbour's house: she would have a bad time of it! Let a Megachile, returning with her leafy disk in her legs, go into the wrong bas.e.m.e.nt: she would be very soon dislodged! So with the others: each has her own home, which none of the others has the right to enter. This is the rule, even among Bees and Wasps established in a populous colony on a common site. Close neighbourhood implies no sort of intimate relations.h.i.+p.

Great therefore is my surprise as I watch the Cylindrical Halictus'

operations. She forms no society, in the entomological sense of the word: there is no common family; and the general interest does not engross the attention of the individual. Each mother occupies herself only with her own eggs, builds cells and gathers honey only for her own larvae, without concerning herself in any way with the upbringing of the others' grubs. All that they have in common is the entrance-door and the goods-pa.s.sage, which ramifies in the ground and leads to different groups of cells, each the property of one mother. Even so, in the blocks of flats in our large towns, one door, one hall and one staircase lead to different floors or different portions of a floor where each family retains its isolation and its independence.

This common right of way is extremely easy to perceive at the time for victualling the nests. Let us direct our attention for a while to the same entrance-aperture, opening at the top of a little mound of earth freshly thrown up, like that acc.u.mulated by the Ants during their works.

Sooner or later we shall see the Halicti arrive with their load of pollen, gathered on the Cichoriaceae of the neighbourhood.

Usually, they come up one by one; but it is not rare to see three, four or even more appearing at the same time at the mouth of one burrow.

They perch on the top of the mound and, without hurrying in front of one another, with no sign of jealousy, they dive down the pa.s.sage, each in her turn. We need but watch their peaceful waiting, their tranquil dives, to recognize that this indeed is a common pa.s.sage to which each has as much right as another.

When the soil is exploited for the first time and the shaft sunk slowly from the outside to the inside, do several Cylindrical Halicti, one relieving the other, take part in the work by which they will afterwards profit equally? I do not believe it for a moment. As the Zebra Halictus and the Early Halictus told me later, each miner goes to work alone and makes herself a gallery which will be her exclusive property. The common use of the pa.s.sage comes presently, when the site, tested by experience, is handed down from one generation to another.

A first group of cells is established, we will suppose, at the bottom of a pit dug in virgin soil. The whole thing, cells and pit, is the work of one insect. When the moment comes to leave the underground dwelling, the Bees emerging from this nest will find before them an open road, or one at most obstructed by crumbly matter, which offers less resistance than the neighbouring soil, as yet untouched. The exit-way will therefore be the primitive way, contrived by the mother during the construction of the nest. All enter upon it without any hesitation, for the cells open straight on it. All, coming and going from the cells to the bottom of the shaft and from the shaft to the cells, will take part in the clearing, under the stimulus of the approaching deliverance.

It is quite unnecessary here to presume among these underground prisoners a concerted effort to liberate themselves more easily by working in common: each is thinking only of herself and invariably returns, after resting, to toil at the inevitable path, the path of least resistance, in short the pa.s.sage once dug by the mother and now more or less blocked up.

Among the Cylindrical Halicti, any one who wishes emerges from her cell at her own hour, without waiting for the emergence of the others, because the cells, grouped in small stacks, have each their special outlet opening into the common gallery. The result of this arrangement is that all the inhabitants of one burrow are able to a.s.sist, each doing her share, in the clearing of the exit-shaft. When she feels fatigued, the worker retires to her undamaged cell and another succeeds her, impatient to get out rather than to help the first. At last the way is clear and the Halicti emerge. They disperse over the flowers around as long as the sun is hot; when the air cools, they go back to the burrows to spend the night there.

A few days pa.s.s and already the cares of egg-laying are at hand. The galleries have never been abandoned. The Bees have come to take refuge there on rainy or very windy days; most, if not all, have returned every evening at sunset, each doubtless making for her own cell, which is still intact and which is carefully impressed upon her memory. In a word, the Cylindrical Halictus does not lead a wandering life; she has a fixed residence.

A necessary consequence results from these settled habits: for the purpose of her laying, the Bee will adopt the identical burrow in which she was born. The entrance-gallery is ready therefore. Should it need to be carried deeper, to be pushed in new directions, the builder has but to extend it at will. The old cells even can serve again, if slightly restored.

Thus resuming possession of the native burrow in view of her offspring, the Bee, notwithstanding her instincts as a solitary worker, achieves an attempt at social life, because there is one entrance-door and one pa.s.sage for the use of all the mothers returning to the original domicile. There is thus a semblance of collaboration without any real co-operation for the common weal. Everything is reduced to a family inheritance shared equally among the heirs.

The number of these coheirs must soon be limited, for a too tumultuous traffic in the corridor would delay the work. Then fresh pa.s.sages are opened inwards, often communicating with depths already excavated, so that the ground at last is perforated in every direction with an inextricable maze of winding tunnels.

The digging of the cells and the piercing of new galleries take place especially at night. A cone of fresh earth on top of the burrow bears evidence every morning to the overnight activity. It also shows by its volume that several navvies have taken part in the work, for it would be impossible for a single Halictus to extract from the ground, convey to the surface and heap up so large a stack of rubbish in so short a time.

At sunrise, when the fields around are still wet with dew, the Cylindrical Halictus leaves her underground pa.s.sages and starts on her foraging. This is done without animation, perhaps because of the morning coolness. There is no joyous excitement, no humming above the burrows.

The Bees come back again, flying low, silently and heavily, their hind-legs yellow with pollen; they alight on the earth-cone and at once dive down the vertical chimney. Others come up the pipe and go off to their harvesting.

This journeying to and fro for provisions continues until eight or nine in the morning. Then the heat begins to grow intense and is reflected by the wall; then also the path is once more frequented. People pa.s.s at every moment, coming out of the house or elsewhence. The soil is so much trodden under foot that the little mounds of refuse surrounding each burrow soon disappear and the site loses every sign of underground habitation.