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A race of beings, to which the epithet mysterious may be with some truth applied, affords more interest from its peculiar habits, than from any proof which can be given of its mental powers; and its place in this work is due to the marvellous histories which have been related concerning it, and which have made it an object of superstitious alarm.

Bats, or Cheiroptera, are particularly distinguished from all other creatures which suckle their young, by possessing the power of flight. A Lemur Galeopithecus, which exists in the Eastern part of the globe, takes long sweeps from tree to tree, and owes this faculty to the extension of its skin between its fore and hind limbs, including the tail; but it cannot be really said to fly. The Bats, then, alone enjoy this privilege; and the prolongation of what, in common parlance, we should call the arms and fingers, constitutes the framework which supports the skin, or membrane forming the wings. The thumbs, however, are left free, and serve as hooks for various purposes. The legs, and tail (when they have any), generally help to extend the membrane of the wing; and the breast-bone is so formed as to support the powerful muscles which aid their locomotive peculiarities. They climb and crawl with great dexterity, and some will run when on the ground; but it is difficult for most of them to move on a smooth, horizontal surface, and they drag themselves along by their thumbs. A portion of the Cheiroptera feeds on insects, and another on fruits; one genus subsists chiefly on blood. The first help to clear the atmosphere of those insects which fly at twilight; the second are very destructive to our gardens and orchards; the last are especially the object of that superstitious fear to which I have already alluded. They are all nocturnal or crepuscular, and during the day remain suspended by the sharp claws of their feet to the under-branches of trees, the roofs of caves, subterranean quarries, or old ruins, hanging with their heads downwards; multitudes live in the tombs of Egypt.

The appearance of Bats is always more or less grotesque; but this term more aptly applies to those which live on animal food, in consequence of the additions made to the nose and ears, probably for the sake of increasing their always acute senses of smell and hearing. The ears are frequently of an enormous size, and are joined together at the back of the head; besides which they have leaf, or lance-shaped appendages in front. A membrane of various forms is also often attached to the nose, in one species the shape of a horse-shoe. The bodies are always covered with hair, but the wings consist of a leathery membrane. Another singularity in one genus is the extremity of the spine being converted into two jointed, horny pieces, covered with skin, so as to form a box of two valves, each having an independent motion. The large bats of the East Indies measure five feet from the tip of one wing to that of the other, and they emit a musky odour. The skin of the Nycteris Geoffroyi is very loose upon the body; and the animal draws air through openings in the cheek pouches, head, and back, and swells itself into a little balloon; the openings being closed at pleasure by means of valves. The bite of all is extremely sharp; and we seldom hear of an instance of one being tamed. They try to shelter themselves from chilly winds, and frequent sheltered spots, abounding in masonry, rocks, trees, and small streams.

About the Vampire, or the blood-sucker, there are different opinions: that of the East is said to be quite harmless; but it is asserted that the South American species love to attach themselves to all cattle, especially to horses with long manes, because they can cling to the hair while they suck the veins, and keep their victim quiet by flapping their wings over its head; they also fasten themselves upon the tail for the first reason, and a great loss of blood frequently ensues. Fowls are frequently killed by them as they roost upon their perches, for so noiseless and gentle are they in their flight and operations, that animals are not awakened out of their sleep by their attacks. The teeth are so disposed that they make a deep and triple puncture, and one was taken by Mr. Darwin in the act of sucking blood from the neck of a horse. This able naturalist and accurate observer is of opinion, that horses do not suffer from the quantity of blood taken from them by the Vampire, but from the inflammation of the wound which they make, and which is increased if the saddle presses on it. Horses, however, turned out to grass at night, are frequently found the next morning with their necks and haunches covered with blood; and it is known that the bat fills and disgorges itself several times. Dr. Carpenter is of the same opinion as Mr. Darwin, and also disbelieves that these creatures soothe their victims by fanning them with their wings.

Captain Stedman, who travelled in Guiana, from 1772 to 1777, published an account of his adventures, and for several years afterwards, it was the fashion to doubt the truth of his statements. In fact, it was a general feeling, up to a much later period than the above, that travellers were not to be believed. As our knowledge, however, has increased, and the works of God have been made more manifest, the reputation of many a calumniated traveller has been restored, and, among others, that of Captain Stedman. I shall, therefore, unhesitatingly quote his account of the bite of the vampire, "On waking, about four o'clock this morning, in my hammock, I was extremely alarmed at finding myself weltering in congealed blood, and without feeling any pain whatever. Having started up and run to the surgeon, with a firebrand in one hand, and all over besmeared with gore, the mystery was found to be, that I had been bitten by the vampire or specter of Guiana, which is also called the flying dog of New Spain. This is no other than a bat of monstrous size, that sucks the blood from men and cattle, sometimes even till they die; knowing, by instinct, that the person they intend to attack is in a sound slumber, they generally alight near the feet, where, while the creature continues fanning with his enormous wings, which keeps one cool, he bites a piece out of the tip of the great toe, so very small indeed, that the head of a pin could scarcely be received into the wound, which is consequently not painful; yet, through this orifice, he contrives to suck the blood, until he is obliged to disgorge. He then begins again, and thus continues sucking and disgorging till he is scarcely able to fly, and the sufferer has often been known to sleep from time into eternity. Cattle they generally bite in the ear, but always in those places where the blood flows spontaneously. Having applied tobacco-ashes as the best remedy, and washed the gore from myself and my hammock, I observed several small heaps of congealed blood all around the place where I had lain, upon the ground; upon examining which, the surgeon judged that I had lost at least twelve or fourteen ounces during the night. Having measured this creature (one of the bats), I found it to be, between the tips of the wings, thirty-two inches and a half; the colour was a dark brown, nearly black, but lighter underneath."

Mr. Waterton, whom all the world recognizes as a gentleman, and consequently a man of truth, laboured at one time under the same stigma of exaggeration as Captain Stedman, and many other illustrious travellers; and he confirms the blood-sucking in the following terms:—"Some years ago, I went to the river Paumarau, with a Scotch gentleman. We hung our hammocks in the thatched loft of a planter's house. Next morning I heard this gentleman muttering in his hammock, and now and then letting fall an imprecation or two, 'What is the matter, Sir,' said I softly, 'is anything amiss?' 'What is the matter!' answered he surlily, 'why the vampires have been sucking me to death.' As soon as there was light enough, I went to his hammock, and saw it much stained with blood. 'There,' said he, thrusting his foot out of the hammock, 'see how these imps have been drawing my life's blood.' On examining his foot, I found the vampire had tapped his great toe. There was a wound somewhat less than that made by a leech. The blood was still oozing from it, and I conjectured he might have lost from ten to twelve ounces of blood."

Mr. Waterton further tells us, that a boy of ten or eleven years of age was bitten by a vampire, and a poor ass, belonging to the young gentleman's father, was dying by inches from the bites of the larger kinds, while most of his fowls were killed by the smaller bats.

The torpidity in which bats remain during the winter, in climates similar to that of England, is well known; and, like other animals which undergo the same suspension of powers, they have their histories of long imprisonment in places which seem inimical to life. There are two accounts of their being found in trees, which are extremely curious, and the more so, because the one corroborates the other. In the beginning of November, 1821, a woodman, engaged in splitting timber for rail-posts, in the woods close by the lake at Haining, a seat of Mr. Pringle's, in Selkirkshire, discovered, in the centre of a large wild-cherry tree, a living bat, of a bright scarlet colour, which, as soon as it was relieved from its entombment, took to its wings and escaped. In the tree there was a recess sufficiently large to contain the animal; but all around, the wood was perfectly sound, solid, and free from any fissure through which the atmospheric air could reach the animal.

A man engaged in splitting timber, near Kelsall, in the beginning of December, 1826, discovered, in the centre of a large pear-tree, a living bat, of a bright scarlet colour, which he foolishly suffered to escape, from fear, being fully persuaded (with the characteristic superstition of the inhabitants of that part of Cheshire), that it was "a being not of this world." The tree presented a small cavity in the centre, where the bat was enclosed, but was perfectly sound and solid on each side. The scarlet colour of each of these prisoners seems at present to be inexplicable, and makes these statements still more marvellous.

Professor Bell, in his admirable work on British Quadrupeds speaks of a long-eared bat which fed from the hand; and if an insect were held between the lips, it would settle on its master's cheek, and take the fly from his mouth with great quietness. So accustomed was it to this, that it would seek his lips when he made a buzzing noise. It folded its beautiful ears under its arm when it went to sleep, and also during hibernation. Its cry was acute and shrill, becoming more clear and piercing when disturbed. It is most frequently seen in towns and villages. This instance of taming to a certain extent might, perhaps, be more frequently repeated, if bats were objects of more general interest.