[to be continued.]
BY WILLIAM HAMILTON GIBSON.
Of all the insects which occasionally claim our attention in our country rambles, there is probably no example more entitled to our distinguished consideration than the plebeian, commonly despised, but admittedly amusing beetle known the country over as the funny "tumble-bug." As we see him now, so he has always been the same in appearance, the same in habits, yet how has he fallen from grace! how humbled in the eyes of man from that original high estate when, in ancient Egypt, he enjoyed the prestige above all insects, where, as the sacred "scarabæus," he was dignified as the emblem of immortality, and worshipped as a god! The archæological history of Egypt is rich in reminders of his former eminence. Not only do we see his familiar shape (as shown in our initial design) everywhere among those ancient hieroglyphs engraved in the rock or pictured on the crumbling papyrus; but it is especially in association with death and the tomb that his important significance is emphasized. The dark mortuary passages and chambers hewn in solid rock often hundreds of feet below the surface, where still sleep the mummied remains of an entire ancient people, and which honeycomb the earth beneath the feet of the traveller in certain parts of Egypt, are still eloquent in tribute to the sacred scarab. The lantern of the antiquarian explorer in those dark dungeons of death discloses the suggestive figure of this beetle everywhere engraved in high relief upon the walls, perhaps enlivened with brilliant color still as fresh as when painted three thousand years ago, emblazoned in gold and gorgeous hues upon the sarcophagus and the mummy-case within, and again upon the outer covers of the winding-sheet, finally, in the form of small ornaments the size of nature, beautifully carved on precious stones enclosed within the wrappings of the mummy itself.
What other insect has been thus glorified and immortalized? For the sake of its proud lineage, if nothing else, is not our poor tumble-bug deserving of our more than passing attention? An insect which has thus been distinguished by an entire great people of antiquity has some claims on our respect and consideration.
But aside from his historical fame, he will well repay our careful study, and serve to while away a pleasant hour in the observance of his queer habits. He is now no longer the awe-inspiring sacred scarab, but Mr. Tumble-bug, or rather "Mr. and Mrs. Tumble-bug," for a tumble-bug always pictured in the ancient hieroglyph is rarely to be seen in its natural haunts. Mr. and Mrs. Tumble-bug are devoted and inseparable, and as a rule vie with each other in the solicitude for that precious rolling ball with which the insects are always associated. From June to autumn we may find our tumble-bugs. There are a number of species included in the group of Scarabæus to which they belong. Two species are particularly familiar, one of a lustrous bronzy hue, with a very rounded track, usually found at work on the country highway in the track of the horse, and the other, the true typical tumble-bug, a flat-backed, jet-black lustrous species which we naturally associate with the barn-yard and cow-pasture. The latter may be taken as an illustrative example of his class, and his ways are identical with that of his ancient sacred congener and present inhabitant of Egypt.
MR. AND MRS. TUMBLE-BUG ROLLING THE BALL.
When we first see them they are generally manipulating the ball—a small mass of manure in which an egg has been laid, and which by rolling in the dust has now become round and firmly incrusted and smooth. Let us follow the couple in their apparently aimless though no less expeditious and vehement labors. They have now brought their globular charge through the grassy stubble, and have reached a clear spot of earth with scattered weeds. Of course we all know from the books that their intention is to find a suitable spot in which to bury this ball, and such being the case, with what astonishing stupidity do they urge on that labor! Here certainly is just the right spot for you, Mrs. Tumble-bug! Stop rolling and dig! But no, she will not listen to reason. She mounts the top of the ball, and, creeping far out upon it, pulls it over forward with her back feet, while Mr. Tumble-bug helps her in a most singular fashion. Does he stand up on his hind legs on the opposite side, and push with his powerful front feet? Oh no; he stands on his head, and pushes with his hind legs. As he pushes, and as the ball rolls merrily on, Mrs. Tumble-bug is continually rolled around with it, and must needs climb backwards at a lively rate to keep her place. A foot or two is thus travelled without special incident, when a slight trouble occurs. The ball has struck an obstacle which neither Mrs. Tumble-bug's pull nor Mr. Tumble-bug's push can overcome. Then follow an apparent council and interchange of Tumble-bug talk, until at length both put their shovel-shaped heads together beneath the sphere, and over it goes among the weeds. It is soon out again upon the open. Now, Mrs. Tumble-bug, everything is plain-sailing for you; here is a long down grade over the smooth clean dirt! Why, the ball would roll down itself if you would only let it; but, no, she will not let it. She pauses, and the ball rests, and both beetles now creep about, shovelling up the dirt here and there with their very queer little flat heads. Ah, perhaps they are going to start that hole which all the books tell us about. But no; the place is evidently not quite satisfactory, both of them seem so to conclude, like two souls with but a single thought. Mrs. T. is up on the bridge in a jiffy, and Mr. T. takes his place at the helm; and now what an easy time they will have of it down this little slope; but, no, again; tumble-bugs don't seem to care for an easy time. A hundred times on their travels will they pass the very best possible spot for that burrow, a hundred times will they persist in guiding that little world of theirs over an obstruction, when a clear path lies an inch to the right or left of them. And here, when their labors might be so easily lightened by a downward grade, what do they do? they deliberately turn the ball about and hustle it along up hill, and that too over dirt that is not half as promising. Up they go! Mrs. T. now seems to have the best of it, and I sometimes have my suspicions whether she is not playing a prank on that unsuspecting spouse working so hard at her back, for he now has not only the ball, but Mrs. T. as well, to shove along, for the most that she can do is to throw the weight of her body forward, which in a steep up grade amounts to nothing as a help.
SINKING THE BALL.
But if she is imposing on Mr. T. in thus guiding the ball up hill, she soon gets the Roland for her Oliver. Mr. T. is put to great extra labor by this whimsical decision of hers, and woe to Mrs. T. when that little chance valley or inequality of surface is reached. Even though she can see it coming and holds the wheel, she rarely seems to take advantage of it to save herself or her ship, while Mr. T., going backward in the rear, of course cannot be expected to know what is coming, nor be blamed for the consequences. With kick after kick from his powerful hind feet, united with the push of his mighty pair in front, the ball speeds up the slope. Now for some reason he gives a backward shove of more than usual force when it was least necessary. The ball had chanced upon the crest of a slope, when, kick! over it goes with a pitch and a bound, and Mrs. T. with it, though this time not on top. Happy is she if the ball simply rolls upon her and pins her down. Such, indeed, is a frequent episode in her experience of keeping the ball arolling, but occasionally the tumble-ball thus started, and out of the control of her spouse at the rear, may roll over and over for a long-distance, but never alone. No amount of demoralization of this sort ever surprises her into losing her grip on her precious globular bundle. When at last it fetches up against a stone or stick, and she assures herself that she and her charge are safe and sound, no doubt she immediately mounts to its crest to signal the lone Mr. T. afar off, who is quickly back of her again, and both are promptly off on a fresh journey. And so they keep it up, apparently for sport, perhaps for an hour.
At length when they have played long enough—for there is no other reason apparent to homo sapiens—they decide to plant their big dirty pellet. The place which they have chosen is not half as promising as many they have passed, but that doesn't seem to matter. Mrs. T. has said, "It shall go here," and that ends it.
Then follows the most singular exhibition of excavation and burial. The ball is now resting quietly on the dirt, and the two beetles are apparently rummaging around beneath it, trying the ground with the sharp edge of their shovel-shaped faces. And now, to avoid confusion, we will dismiss Mr. T., and confine our observation strictly to the female, who usually (in my experience) conducts the rest of the work alone.
YOUNG TUMBLE-BUG DIGGING OUT FROM HIS DUNGEON.
She has evidently found a spot that suits her, and we expect her to fulfil the directions of the books and entomological authorities. She must "dig a deep hole first, and then roll the ball into it, and fill it up again." But we will look in vain for such obedience. Instead of this she persists in ploughing around beneath the ball, which seems at times almost balanced on her back, until all the earth at this point is soft and friable, and she is out of sight under it. Presently she appears again at the surface, and as quickly disappears again, this time going in upside down beneath the ball, which she pulls downward with her pair of middle feet, while at the same time with hind legs and powerful digging front legs she pushes outward and upward the loose earth which she has accumulated. Visibly the ball sinks into the cavity moment by moment as the earth is lowered for a space of half an inch in the surrounding soil, and continually forced upward outside of its circumference. In a few moments the pellet has sunk level with the ground, and in a few moments more the loose earth pushed upward has overtopped it and it is out of sight. Still, for hours this busy excavator continues to dig her hole and pull the ball in after her with shovel head and molelike digging feet, scooping out a circular well much larger than the diameter of the ball, which slowly sinks by its own weight, aided by her occasional downward pull as this same loosened earth is pushed upward above it. The burrow is thus sunk several inches, when the beetle ploughs her way to the surface and is ready for another similar experience.
The remaining history of the ball and its change is soon told. The egg within it soon hatches, the larva finding just a sufficiency of food to carry it to its full growth, when it transforms to a chrysalis, and at length to the tumble-bug like its parent. The formerly loose earth above him is now firmly packed, but he seems to know by instinct why those powerful front feet were given to him, and he is quickly working his way to the surface, and in a day or so is seen in the barn-yard rolling his ball as skilfully as his mother had done before him.
Such is the method always employed by the tumble-bug as I have seen him. And yet I have read in many natural histories and have heard careful observers claim that the hole is dug first and the ball rolled in. Perhaps they vary their plan, but I doubt it. Here is a matter for some of our boys and girls to look into.
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