Part 8

Astronomers and microscopists make use of the strongest lines of the spider's web to form some of their delicate instruments. The thread is drawn in parallel lines at right angles across the field of the eye-piece at equal distances, so as to make a multitude of fine divisions, scarcely visible to the naked eye, and so thin as to be no obstacle to the view of the object. One means of classifying spiders is by the number of eyes they possess. These are usually two, six, or eight in number. The fangs with which the spider seizes its prey are hollow, and emit a venomous fluid into the body of the victim, which speedily benumbs and kills it. In Palestine and other countries a kind of spider is found which is entirely nocturnal in its habits, and never either hunts or feeds in daylight, but makes itself a little home, where it abides safely till sunset. It is called the trap-door spider, from the curious way in which it protects the entrance to its nest. It bores a hole in the dry earth of a bank a foot or more in depth, lines the hole with silk, and forms a lid, or trap-door, which secures the spider from all intruders. I have one of these nests in which the door is a wonderful piece of mechanism, quite round and flat, about as large as a threepenny piece, made of layers of fine earth moistened and worked together with silk, so that it is tough and elastic and cannot crumble. The hinge is made of very tough silk, and is so springy that when opened it closes directly with a snap. The outside is disguised with bits of moss, glued on so that no one can see where the door is. The only way of opening it is with a pin, and even then the spider will hold on inside with his claws, so that it is not easy to overcome his resistance. Amongst some insects sent to me from Los Angelos is a huge "Mygale," a hairy monster of very uninviting aspect. When its legs are outspread it measures nearly six inches across, and one can well believe the stories one hears of its killing small birds if it finds them on their nests. A gentleman living in Bermuda is said to have tamed a spider of the species "Mygale," and made it live upon his bed-curtain and rid him of the flies and mosquitoes which disturbed his nightly rest. He thus describes this remarkable pet: "I fed him with flies for a few days, until he began to find himself in very comfortable quarters, and thought of spinning a nest and making his home. This he did by winding himself round and round, combing out the silk from the spinnerets at the end of his body till he had made a nest as large as a wine-glass, in which he sat motionless until he saw a fly get inside our gauzy tent; then I could fancy I saw his eyes twinkle as his victim buzzed about, till, when it was within a yard or so of him, he took one spring and the fly was in his forceps, and another leap took him back to his den, where he soon finished the savoury morsel. Sometimes he would bound from side to side of the bed and seize a mosquito at every spring, resting only a moment on the net to swallow it. In another corner of the room was the nest of a female Mygale of the same species. She spun some beautiful little silk bags, larger than a thimble, of tough yellow silk, in each of which she laid more than a dozen eggs. When these hatched the young spiders used to live on her back until they were old enough to hunt for themselves. I kept my useful friend on my bed for more than a year and a half, when, unfortunately, a new housemaid spied his pretty brown house, pulled it down, and crushed under her black feet my poor companion." This kind of spider, or an allied species, captures large butterflies in the tropical woods by hanging strong silken noozes from branches of trees, and they have been seen to kill small birds by this method. One of our British spiders lives under water in a dome-like cell of silk, which is filled with air like a diving-bell by the spider carrying down successive globules of air between its legs, which it liberates under the dome until it is filled; and the young are hatched there.

The spider, on its way through the water, never gets wet. It is hairy, and is enveloped in a bubble of air, in which it moves about protected from wet and well supplied with air to breathe. As the spider's supply of food is always precarious, they are able to live a long time without eating. One is known to have lived eighteen months corked up in a phial, where it could obtain no food; but though thus able to fast, the spider is a voracious feeder, and will eat his own kith and kin when hard pressed by hunger.

I believe it is now thought that the spider of the Scriptures was a kind of spiny lizard called the Gecko. One of this species was sent to me from California, and lived for a few weeks, but as nothing would induce it to eat, to my great regret it pined and died. It was about as large as an ordinary full-grown toad, of a speckled grey colour, with rich brown markings, its head something like a lizard, with large thorny projections which extended all along the spine. The feet were very remarkable, each toe being furnished with a sucker which enabled the Gecko to walk with perfect ease in any position on a wall or pane of glass without losing its hold; and travellers say that it is a frequent inmate of Eastern houses, and may be seen catching flies as it creeps along walls and ceilings.

Many kinds of spiders run with ease upon the surface of ponds and ditches, and one forms a kind of raft of a few dead leaves woven together, on which it sits and is blown by the wind hither and thither, and thus is enabled to prey upon various aquatic insects.

The surface of grass lawns may be seen on autumnal mornings covered with tiny webs gemmed with dew. We may therefore estimate the immense number of flies captured by these traps so thickly spread over the grass, and see in them another proof of the adaptation of each created thing for its special purpose, and how wonderfully the balance of nature is maintained, so that one creature keeps another in check, and all work harmoniously together, according to the will of our great Creator.

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[Illustration]

TAME BUTTERFLIES.

In _The Century_, for June, 1883, Mr. Gosse described a monument, in which the sculptor had carved a child holding out her hand for butterflies to perch on. He went on to say that this was criticised as improbable, even by so exact an observer as the late Lord Tennyson. It may therefore be of some interest to record the following facts from my personal experience.

One summer I watched the larvae of the swallow-tailed butterfly through their different stages, and reserved two chrysalides to develop into the perfect insect. In due time one of these fairy-like creatures came out. I placed it in a small Indian cage, made of fine threads of bamboo. A carpet of soft moss and a vase of flowers in the centre made a pleasant home for my tiny "Psyche."

I found that she greatly enjoyed a repast of honey; when some was placed on a leaf within her reach, she would uncoil her long proboscis and draw up the sweet food with great apparent enjoyment.

She was so tame that it became my habit, once or twice a day, to take her on my finger; and while I walked in the garden she would take short flights hither and thither, but was always content to mount upon my hand again. She would come on my finger of her own accord, and, if the day was bright, would remain there as long as I had patience to carry her, with her wings outspread, basking in the sunbeams, which appeared to convey exquisite delight to the delicate little creature.

I never touched her beautiful wings. She never fluttered or showed any wish to escape, but lived three weeks of tranquil life in her tiny home; and then having, as I suppose, reached the limit of butterfly existence, she quietly ceased to live.

On the day of her death the other butterfly emerged, and lived for the same length of time. Both were equally tame, but the second showed more intelligence, for she discovered that by folding her wings together she could easily walk between the slender bars of the cage; and having done so she would fly to a window, and remain there basking in the sun, folding and unfolding her wings with evident enjoyment, until I presented my finger, when she would immediately step upon it and be carried back to her cage.

The tameness of these butterflies I ascribed in great measure to the fact of their having been hatched from chrysalides, and having therefore never known the sweets of liberty. I often wondered if really wild specimens could be won by gentle kindness and made happy in confinement, and one bright summer's day I resolved to try. A "Painted Lady" had been seen in the garden the day before, and I soon caught sight of her making rapid flights from one bed of flowers to another, and when resting for a few minutes, folding and unfolding her wings on the gravel path, I crept slowly up to her with a drop of honey on my finger to try and make friends; but my "lady" was coy, "she would and she wouldn't," and after letting me come within a few inches with my tempting repast, she floated away, out of sight, and I feared she would not be willing to give me another chance; however, I waited quietly, and in a few minutes she alighted at a little distance. I again drew near very slowly, and again she sailed away, but the third time she gained confidence enough to reach out her proboscis and taste the honey, and finally crept upon my finger. I very gently placed the light bamboo cage over her and brought her indoors; she, all the while, entranced with the sweet food, remained quietly on my finger, and when satisfied, crept upon a flower in the middle of the cage, and after a few flutterings round her cage seemed content and folded her delicate wings to rest. Whilst engaged in her capture I had observed a "Red Admiral" hovering over some dahlias, and thinking "Cynthia"[2] might like a companion, I tried my blandishments upon him. I had not much hope of success, for though a bold, fearless fellow, he is very wary, and his powerful wings bear him away in swift flight when alarmed. Many a circle did I make around that dahlia bed! "Admiral" always preferred the opposite side to where I stood, and calmly crossed over whilst I went round. At last, by long and patient waiting, he, too, allowed me to come near and present my seductive food to his notice--the wiry proboscis was uncoiled and felt about for the honey; once plunged into that, all volition seemed to cease, he allowed me to coax him upon my finger, and he, too, was safely caged; but he behaved very differently from "fair Cynthia." The moment his repast was ended he flapped with desperate force against the bars, and in a minute he was out and on the window-pane, fluttering to escape. The cage had to be secured with fine net, and he was replaced and soon quieted down. Twice a day these delicate little pets would come upon my hand to receive their sweet food, and appeared perfectly content in captivity.

[Footnote 2: The former Latin name for the "Painted Lady" butterfly]

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ANT-LIONS.

(MYRMELEON FORMICARIUS.)

Many years ago a friend sent me some of these remarkable insects from the Riviera, and for sixteen months I fed them as regularly as possible, but the cold of a remarkably severe winter killed them, to my great disappointment, as I had hoped to be rewarded by a sight of the perfect insect.

Ant-lions are not, I believe, found in any part of England, so I had to wait till I could again procure some from the south of France, where they are frequently met with in dry, sandy places.

Early in March this year (1890) three specimens were sent me and were at once placed in a box of dry silver sand, where they buried themselves and remained quietly resting for some hours.

Many of my readers may be interested to know what the ant-lion is like, and why I thought it worth while to take great pains to rear it. These young specimens were flat, grey, six-legged creatures about the size of a small lady-bird, covered with hairs, and possessing two strong forceps projecting from their heads. They are so formed that they cannot go forward, but move always backward by a series of jerks. As they live upon ants and are so strangely formed, they have to resort to stratagem in order to entrap their prey, and this they do by means of pits formed in the sand in which they live; into these pits the ants fall, and are seized by the forceps of the ant-lion, who lies in wait at the bottom.

Many a time have I watched the formation of these pits, and will try to describe the process. The insect begins describing a small circle on the surface of the sand by jerking himself backwards and flinging the sand away with his flat head and closed forceps, which form a kind of shovel. Each circle is smaller than the last, until the pit is like an inverted cone, and the ant-lion lies buried at the bottom, only his forceps being visible. When an ant has fallen headlong down into the pit it makes frantic efforts to escape, and if the ant-lion sees that it is likely to get beyond his reach, he then with his forceps flings some sand at it with such unerring aim the poor victim is sure to roll over and over until it reaches the jaws of its captor, who feasts upon it and then flings the remains of the body out of the pit.

One difficulty was how to ensure a supply of ants, but this was overcome by filling a box with part of an ants' nest, and as these insects settled down and seemed content with their quarters, they were ready when wanted, and three times a day the lions had to be fed! One learns to sacrifice one's feelings in the cause of science, but to the last it was a real distress to me to have to put the poor little ants where they would be devoured; but Nature is cruel, and from the real lion to his insect namesake, preying upon one another seems the prevailing law of her realm.

As the ant-lions grew, the pits increased in size. At first they were about as large as a threepenny-piece, but ended by measuring more than two inches across.

I could not tell whether the insect moulted its skin, as it was always hidden, but in July, after four months' feeding, the ant-lions changed into chrysalides, which looked like perfectly round balls of sand.

The box was placed in a warm greenhouse, and in seven weeks' time the perfect insects appeared. They were like small dragon-flies, with slender bodies, four black-spotted gauzy wings, two large black eyes and short antennae.

I had read about their being nocturnal insects, feeding on flies, so they had that diet provided for them in the glass globe in which they were kept, but I could never feel sure that they ate the flies, and fearing they would be starved I tried giving them a little sweet food, a drop of raspberry syrup at the end of a twig; it seemed to be the right thing, for they greedily sucked it in, but in spite of all my care they only lived four weeks; which, however, is probably the term of their existence.

Whilst I was writing this paper a singular incident occurred. I heard a strange, wild note, and something brilliant dashed past me to the end of the room, and there, on a white marble bust sat a lovely kingfisher--a bird I had hardly ever seen, even at a distance, and here he had come to pay me a visit in my drawing-room. Would that I could have told him how welcome he was! but, alas! he darted about the room in wild alarm, flew against the looking-glasses, and though I tried to guard him from a plate-glass window, that has often proved fatal to birds, I was too late; he came with a crash against it and fell down quite dead, his neck being broken by the force of the blow.

I had heard that a kingfisher had been seen at my lake, and hoped that the bird might build and become established there; it was, therefore, a keen regret to me that this bright visitant had met with such an untimely fate.

[Illustration: THE ROBIN.]

ROBINS I HAVE KNOWN.

If I once begin to speak about these winning, confiding little birds, I shall hardly know when to stop. There can scarcely be a more delightful pet than a wild robin which has learnt to love you, and will come indoors and be your quiet companion for hours together. One can feel happy in the thought that he has his liberty and his natural food out of doors, and that he gives you his companionship freely because he likes to be with you, and shows that he does, by singing his sweet songs perched on the looking-glass or some vase of flowers.

Autumn is the best time to begin taming such a little friend. When one of those brown-coated young birds in his first year's plumage (before the red feathers show) takes to haunting the window-ledge, or looks up inquiringly from the gravel path outside, then is the time to throw out a mealworm, four or five times a day, when the bird appears. He will soon associate you with his pleasant diet, and come nearer, and grow daily less fearful, until, by putting mealworms on a mat just inside the room, he will come in and take them, and at last learn to be quite content to remain. The first few times the window should be left open to let him retreat, for unless he feels he can come and go at will he will probably make a dash at a closed window, not seeing the glass, and be fatally injured, or else too frightened to return.

Like all other taming, it must be carried on with patience.

One summer, many years ago, we occupied an old-fashioned house in the country, where, in perfect quietude, one could make acquaintance with birds and study their habits and manners without interruption. From the veranda of a large, low-ceilinged sitting-room one looked out upon a garden of the olden type, full of moss-grown apple-trees, golden daffodils, lupines and sweet herbs, that pleasant mixture of the kitchen and flower garden which always seems so enjoyable. It was an ideal home for birds, no cat was ever visible, and from the numbers of the feathered folk one could believe that countless generations had been reared in these apple-trees and lived out their little lives in perfect happiness. I soon found a friend amongst the robins; one in particular began to pay me frequent visits as I sat at work indoors. At first he ventured in rather timidly, took a furtive glance and then flew away, but finding that crumbs were scattered for him, and while he picked them up a kindly voice encouraged his advances, he soon became at ease, made his way into the room and seemed to examine by turns, with birdish curiosity, all the pieces of furniture and the various ornaments on the mantelpiece and tables. Much to my pleasure he began to sing to me, and very pretty he looked, sitting amongst the flowers in a tall vase, warbling his charming little ditty, keeping his large black eyes fixed upon me as if to see if I seemed impressed by his vocal efforts.

Once he stopped in the middle of his song, looked keenly at a corner of the ceiling, and after a swift flight there, he returned with a spider in his beak; one can well believe what good helpers the insect-eating birds must be to the gardener, by destroying countless hosts of minute caterpillars and grubs that would otherwise prey upon the garden produce. Bobbie continued his visits to me throughout the summer, remaining happy and content for hours at a time, pluming himself, singing, and at times investigating the contents of a little cupboard, where he sometimes discovered a cake which was much to his taste, on which he feasted without any leave asked, though truly it would have been readily given to such a pleasant little visitor. He soon showed such entire confidence in me that he would perch on the book I was reading, and alight on my lap for crumbs even when many people were in the room.

When we had to leave this country home I wished that dear Bobbie could have been packed up to go elsewhere with our other possessions, but since this could not be, let us hope he still inhabits the old garden and cheers other home-dwellers with his confiding manners and morning and evening songs of praise.

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[Illustration]

ROBERT THE SECOND.

After slight intimacies with various robins who were visitors to the conservatory and found their way in and out at the open windows, I was led to special friendship with a brown-coated young bird I used often to see close to the open French window where I was sitting. He was coaxed into the room by mealworms being thrown to him until he made himself quite at home indoors. By the time he had attained his red breast the weather had become too cold for open windows, but Bobbie would sit on the ledge and wait till I let him in, and then he would be my happy little companion for the whole morning, flitting all about the room, along the corridor, into the hall--in fact, he was to be found all over the house; but when hungry he returned to me as his best friend, because I was the provider of his delightsome mealworms. It was always amusing to visitors to see me feed my small fowl! He would be on the alert to see where his prey was to be found, and he would hunt for it perseveringly if it happened to fall out of sight. He was often to be seen perched on the Californian mouse's cage, and I wondered what could be the attraction; at last I discovered that he coveted mousie's brown biscuits, and after that he was allowed one for his own use, kept in a special corner, where a cup of water was also provided for his small requirements.