Eight Years' Wanderings in Ceylon, Sir Samuel White Baker [best summer reads of all time TXT] 📗

it sinks to the earth, and it vanishes altogether.

Some persons might imagine that she feeds upon the ordure, and that she has buried her store as a dog hides a bone; but this is not the case; she has formed a receptacle for her eggs, which she deposits in the ball of dung, the warmth of which assists in bringing the larvae into life, which then feed upon the manure.

It is wonderful to observe with what rapidity all kinds of dung are removed by these beetles. This is effected by the active process of rolling the loads instead of carrying, by which method a large mass is transported at once.

The mason-fly is also a ball-maker, but she carries her load and builds an elaborate nest. This insect belongs to the order "Hymenoptera," and is of the Ichneumon tribe, being a variety of upward of four hundred species of that interesting fly.

The whole tribe of Ichneumon are celebrated for their courage; a small fly will not hesitate to attack the largest cockroach, who evinces the greatest terror at sight of his well-known enemy; but the greatest proof of valor in a fly is displayed in the war of the ichneumon against the spider.

There is a great variety of this insect in Ceylon, from the large black species, the size of the hornet down to the minute tinsel-green fly, no bigger than a gnat; but every one of these different species wages perpetual war against the arch enemy of flies.

In very dry weather in some districts, when most pools and water-holes are dried up, a pail of water thrown upon the ground will as assuredly attract a host of mason-flies as carrion will bring together "blow-flies." They will be then seen in excessive activity upon the wet earth, forming balls of mud, by rolling the earth between their fore feet until they have manufactured each a pill. With this they fly away to build their nest, and immediately return for a further supply.

The arrangement of the nest is a matter of much consideration, as the shape depends entirely upon the locality in which it is built: it may be in the corner of a room, or in a hole in a wall, or in the hollow of a bamboo; but wherever it is, the principle is the same, although the shape of the nest may vary. Everything is to be hermetically sealed.

The mason-fly commences by flattening the first pill of clay upon the intended site (say the corner of a room); she then spreads it in a thin layer over a surface of about two inches, and retires for another ball of clay. This she dabs upon the plastic foundation, and continues the apparently rude operation until some twenty or thirty pills of clay are adhering at equal distances. She then forms these into a number of neat oval-shaped cells, about the size of a wren's egg, and in each cell she deposits one egg. She then flies off in search of spiders, which are to be laid tip in stores within the cells as food for the young larvae, when hatched.

Now the transition from the larva to the fly takes place in the cell, and occupies about six weeks from the time the egg is first laid; thus, as the egg itself is not vivified for some weeks after it is deposited, the spiders have to be preserved in a sound and fresh state during that interval until the larva is in such an advanced stage as to require food.

In a tropical country every one knows that a very few hours occasion the putrefaction of all dead animal substances; nevertheless these spiders are to be kept fresh and good, like our tins of preserved meats, to be eaten when required.

One, two, or even three spiders, according to their size, the mason-fly deposits in each cell, and then closes it hermetically with clay. The spiders she has pounced upon while sunning themselves in the centre of their delicate nets, and they are hurried off in a panic to be converted into preserved provisions. Each cell being closed, the whole nest is cemented over with a thick covering of clay. In due time the young family hatch, eat their allowance of spiders, undergo their torpid change, and emerge from their clay mansion complete mason-flies.

Every variety of Ichneumon, however (in Ceylon), chooses the spider as the food for its young. It is not at all uncommon to find a gun well loaded with spiders, clay and grubs, some mason-fly having chosen the barrel for his location. A bunch of keys will invite a settlement of one of the smaller species, who make its nest in the tube of a key, which it also fills with minute spiders.

In attacking the spider, the mason-fly his a choice of his antagonist, and he takes good care to have a preponderance of weight on his own side. His reason for choosing this in preference to other insects for a preserved store may be that the spider is naturally juicy, plump and compact, combining advantages both for keeping and packing closely.

There are great varieties of spiders in Ceylon, one of which is of such enormous size as to resemble the Aranea avicularia of America. This species stands on an area of about three inches, and never spins a web, but wanders about and lives in holes; his length of limb, breadth of thorax and powerful jaws give him a most formidable appearance. There is another species of a large-sized spider who spins a web of about two and a half feet in diameter. This is composed of a strong, yellow, silky fibre, and so powerful is the texture that a moderate-sized walking-cane thrown into the web will be retained by it. This spider is about two inches long, the color black, with a large yellow spot upon the back, and the body nearly free from hair.

Some years ago an experiment was made in France of substituting the thread of the spider for the silk of the silkworm: several pairs of stockings and various articles were manufactured with tolerable success in this new material, but the fibre was generally considered as too fragile.

A sample of such thread as is spun by the spider described could not have failed to produce the desired result, as its strength is so great that it can be wound upon a card without the slightest care required in the operation. The texture is far more silky than the fibre commonly produced by spiders, which has more generally the character of cotton than of silk.

Should this ever be experimented on, a question might arise of much interest to entomologists, whether a difference in the food of the spider would affect the quality of the thread, as is well known to be the case with the common silkworm.

A Ceylon night after a heavy shower of rain is a brilliant sight, when the whole atmosphere is teeming with moving lights bright as the stars themselves, waving around the tree-tops in fiery circles, now threading like distant lamps through the intricate branches and lighting up the dark recesses of the foliage, then rushing like a shower of sparks around the glittering boughs. Myriads of bright fire-flies in these wild dances meet their destiny, being entangled in opposing spiders' webs, where they hang like fairy lamps, their own light directing the path of the destroyer and assisting in their destruction.

There are many varieties of luminous insects in Ceylon. That which affords the greatest volume of light is a large white grub about two inches in length, This is a fat, sluggish animal, whose light is far more brilliant than could be supposed to emanate from such a form.

The light of a common fire-fly will enable a person to distinguish the hour on a dial in a dark night, but the glow from the grub described will render the smallest print so legible that a page may be read with case. I once tried the experiment of killing the grub, but the light was not extinguished with life, and by opening the tail, I squeezed out a quantity of glutinous fluid, which was so highly phosphorescent that it brilliantly illumined the page of a book which I had been reading by its light for a trial.

All phosphorescent substances require friction to produce their full volume of light; this is exemplified at sea during a calm tropical night, when the ocean sleeps in utter darkness and quietude and not a ripple disturbs the broad surface of the water. Then the prow of the advancing steamer cuts through the dreary waste of darkness and awakens into fiery life the spray which dashes from her sides. A broad stream of light illumines the sea in her wake, and she appears to plough up fire in her rush through the darkened water.

The simple friction of the moving mass agitates the millions of luminous animalcules contained in the water; in the same manner a fish darting through the sea is distinctly seen by the fiery course which is created by his own velocity.

All luminous insects are provided with a certain amount of phosphorescent fluid, which can be set in action at pleasure by the agitation of a number of nerves and muscles situated in the region of the fluid and especially adapted to that purpose. It is a common belief that the light of the glow-worm is used as a lamp of love to assist in nocturnal meetings, but there can be little doubt that the insect makes use of its natural brilliancy without any specific intention. It is as natural for the fire-fly to glitter by night as for the colored butterfly to be gaudy by day.

The variety of beautiful and interesting insects is so great in Ceylon that an entomologist would consider it a temporary elysium; neither would he have much trouble in collecting a host of different species who will exhibit themselves without the necessity of a laborious search. Thus, while he may be engaged in pinning out some rare specimen, a thousand minute eye-flies will be dancing so close to his eyeballs that seeing is out of the question. These little creatures, which are no larger than pin's heads, are among the greatest plagues in some parts of the jungle; and what increases the annoyance is the knowledge of the fact that they dance almost into your eyes out of sheer vanity. They are simply admiring their own reflection in the mirror of the eye; or, may be, some mistake their own reflected forms for other flies performing the part of a "vis-a-vis" in their unwearying quadrille.

A cigar is a specific against these small plagues, and we will allow that the patient entomologist has just succeeded in putting them to flight and has resumed the occupation of setting out his specimen. Ha! see him spring out of his chair as though electrified. Watch how, regardless of the laws of buttons, he frantically tears his trowsers from his limbs; he has him! no he hasn't!--yes he has!--no--no, positively he cannot get him off. It is a tick no bigger than a grain of sand, but his bite is like a red-hot needle boring into the skin. If all the royal family had been present, he could not have refrained from tearing off his trowsers.

The naturalist has been out the whole morning collecting, and a pretty collection he has got--a perfect fortune upon his legs alone. There are about a hundred ticks who have not yet commenced to feed upon him; there