Butterflies and Moths Part 7

If you wish to be a naturalist in the true sense of the term, study your _specimens_, and take but little pains to commit their hard names to memory; and you will then find that the latter will gradually become your own property without any special effort on your part. Your continued reference to ill.u.s.trated works and museum collections will bring them to you almost unconsciously, and you will generally find your entomological vocabulary extending as rapidly as your cabinet becomes filled.

Again, with regard to the _meanings_ of the scientific terms, don't trouble much about them. It unfortunately happens that in a very large number of cases these names are ill chosen, and do not in any way refer to the distinguis.h.i.+ng characteristics of the species to which they are applied. You will observe, too, if you look at the table, that many insects have _two_ scientific names applied to the species, one being placed in brackets after the other. In such cases both these names are in common use, having both been applied by independent authorities, and the insertion of the two will prove an a.s.sistance at times.

It is a common practice with entomologists, in their communications, to use only the second or _specific_ name of insects. Thus, they would speak of the Brimstone b.u.t.terfly as _Rhamni_, and not _Gonopteryx Rhamni_. When _writing_ a communication, however, they very commonly place in front of the specific name the initial letter of the first or _generic_ name. Thus the full t.i.tle of the b.u.t.terfly just mentioned would be abbreviated to _G. Rhamni_.

Having said so much concerning the principles of cla.s.sification and nomenclature, we will pa.s.s on to the practical portion of the entomologist's work.

PART II

WORK AT HOME AND IN THE FIELD

CHAPTER VI

_CATCHING b.u.t.tERFLIES AND MOTHS_

It is not at all surprising that entomology should prove such a fascinating study to the young, and more especially that portion which deals with the department we are now considering. b.u.t.terflies and moths are among the most beautiful and most interesting of living creatures.

The study of their life history is enchanting, and the creatures themselves are of such a size as to be conveniently handled and preserved, and withal occupy so little s.p.a.ce that anyone with only moderate accommodation may possess a fairly typical collection.

Compare the work of the entomologist with that of one whose hobby is the study of mammals. The latter has to deal with large and c.u.mbersome objects, a collection of which requires an enormous amount of s.p.a.ce; and, unless he has the time and means to travel in foreign countries, he cannot get together a good typical collection of specimens representing his particular branch, for the few British mammals contain no representatives of several of the orders into which the cla.s.s is divided.

Entomology is undoubtedly, _par excellence_, _the_ study for youngsters.

It is equally suited to the studious and to those of an adventurous turn of mind. It leads its follower into the bright suns.h.i.+ne and the flowery meadows; and with body and mind pleasantly occupied, the joy of living is deeply felt. The necessary apparatus can be made by anyone. No dangerous gun is required, and there are no precipitous rocks to scale.

When the autumn flowers fade the year's work of the entomologist is not done, for the arranging of his cabinet and the demands of his living specimens keep him more or less actively engaged until the flowers of the following spring call both him and the insects he loves once more into the field. And so, season after season, and year after year, he finds himself engrossed in labours so fascinating that idleness--the curse of so many of our youths--is with him an impossibility.

I a.s.sume that the readers of this book have a desire to take up the study of one branch of entomology--that of b.u.t.terflies and moths--in real earnest; that they intend not only to _read_ about these interesting insects, but to _know_ them. And there is only one way in which one may really get to know living creatures; that is by searching them out in their haunts, observing their growth and habits, and by an occasional close examination in order to become acquainted with their structure.

Hence I shall in this, the practical portion of the work, give such information as will a.s.sist the beginner in catching, preserving, rearing, breeding, and arranging the specimens that are to form his collection.

_Catching b.u.t.terflies_

There was a time when we would try to capture a b.u.t.terfly at rest on a flower by a quick sweep of the hand, or, more commonly, by a sharp downward stroke of the cap. We were led to this action by a mere childish love of sport, or by a desire to possess an insect simply because it was pretty. When we succeeded in securing our prize, we handled it somewhat carelessly, often pa.s.sing it from one hand to the other, or boxing it in our closed and perspiring fist till our fingers were dusted with the pretty microscopic scales of the creature's wings, and the wings themselves, stripped of all their beautiful clothing, were merely transparent and veined membranes. Having thus carelessly but unintentionally deprived the creature of its greatest beauty, we set it free, often in such a damaged or exhausted condition that the poor thing could scarcely fly.

But our childish ideas and inclinations have vanished. Now we would rather watch the insect than catch it, for we find much pleasure and interest in its varied movements. And if for purposes of study we occasionally require to make one captive, we proceed in such a manner as to preserve its beauty unimpaired. The cap now gives place to a well-made and suitable net; and we are careful to provide ourselves with sufficient and proper accommodation for our captives.

It is probable that many of my readers are as yet unacquainted with the nature of an entomologist's requirements for field work, so we shall describe them, confining ourselves at first to those that are required for a b.u.t.terfly hunt.

First and foremost comes the net. This essential portion of your equipment may be either purchased or constructed by yourself. Very little skill is required to enable you to do the former. Provided your pocket is well charged, you may start off at once to the dealer in naturalists' appliances, and treat yourself to a complete outfit. But even in this case a little advice may not be out of place. See that what you purchase is very _strongly_ made. You can get nicely finished nets constructed on the most convenient principles, made to fold and go in an ordinary coat pocket, but with _weak joints_. See that you have the most convenient form of net by all means, but do not go in for convenience and appearance at the expense of strength and durability. Nothing is more annoying than to find your net give way just when you are in the midst of a good day's sport.

[Ill.u.s.tration: FIG. 39.--A WIRE FRAME FOR A b.u.t.tERFLY NET.]

[Ill.u.s.tration: FIG. 40.]

The folding net is certainly very convenient, for you can conceal it in your pocket while you are walking through town or travelling in a railway carriage, and thus avoid that contemptuous gaze which certain of the public are p.r.o.ne to cast on a poor 'bug hunter.' And although such nets are generally purchased, yet they _may_ be constructed by anyone who has had experience in the working of metals. But other forms of nets, equally useful and even stronger, can be made by anybody; and I will give a few hints on two or three different ways of putting them together.

A very simple and strong frame for a net may be made as follows: Get a piece of stout iron or bra.s.s wire about forty inches in length, and bend it into a circle with the two ends, turned out about two inches each, at right angles to the circ.u.mference as shown in the accompanying sketch.

Now take a good tough stick, the length of an ordinary walking stick, and cut out two grooves opposite each other at the end, just large enough to take the straight ends of the wire. The end of the stick will now resemble fig. 40 in shape. Place the ends in their grooves, and bind them tightly to the stick by a good many turns of rather fine wire.

A frame well made after this fas.h.i.+on is as strong as anything you could desire, but it has the disadvantage of being always fixed to the handle, thus preventing the use of the latter as a walking stick when you are not directly engaged in your entomological work.

A much more convenient frame may be made by thrusting the ends of a piece of cane into the two narrow arms of a metal Y. You may purchase the Y at any of the naturalists' stores, or you can make one yourself if you know how to perform the operation of soldering. I have always made mine with odds and ends of bra.s.s tubing such as old gas pipes. One piece must be just the size to fix on the stick; and the other two must fit the cane tightly. The three pieces must be filed off at the proper angles, and the doubly bevelled end of the wider tube must then be flattened down to the width of the smaller ones before soldering. If you decide to buy one, give the preference to strong bra.s.s rather than the cheaper and more fragile ones made of tinned iron.

[Ill.u.s.tration: FIG. 41. THE METAL Y.]

The advantage of such an arrangement over the last frame is evident at once. The cane, with net attached, can be pulled out of the Y when not in use, and bent small enough to go in the pocket or a satchel; and the Y can also be separated from the stick, thus allowing the latter to be used as a walking stick.

Some entomologists speak very favourably of what is known as the 'umbrella net'--a large and light net that will shut up like an umbrella, and may even be made to look very much like this useful protector, but the possession of such an imitation is somewhat tantalising in a pelting shower. The ring of this net consists of two steel springs attached to a couple of bra.s.s hinges, one of which is fixed near one end of the handle, while the other slides up and down in the gamp fas.h.i.+on.

One other form of net--'the clap net'--although still occasionally seen, has had its best days. Two sticks are provided to this one, so that the two sides of the net may be brought together on the insect; but as both hands are required to manage it, it is almost surprising that it ever had any advocates at all.

When your frame is completed, sew round it a strip of strong calico, to which the net itself may be afterwards sewn, for the lighter material of the net is too delicate to stand the constant friction against the metal or cane frame.

The material usually employed in making the 'bag' is called leno. It can be purchased at most of the drapers' shops, and three colours--white, yellow and green--are usually kept in stock. Measure the circ.u.mference of your net frame, and see that you get sufficient leno to make a good full net. Suppose, for instance, that the circle of your frame measures thirty-six inches round, then your leno should be at least forty inches in length. Fold this double, and then cut out two pieces of the shape shown in fig. 42, letting the depth of the net be nearly or quite equal to the width of the material. There is nothing to be done now but to st.i.tch the bag together and sew it to the calico on the ring.

[Ill.u.s.tration: FIG. 42.]

At first you will find the leno rather stiff and harsh, but a damping and good rubbing between the hands will soften it down; or, if you prefer it, you may soften the material by a slight was.h.i.+ng before cutting out the net. The latter is perhaps the better plan, for the was.h.i.+ng will remove the objectionable 'dressing' that renders the material rather hard and stiff.

Of the three colours mentioned above, green is the one most generally chosen, because it is more in harmony with the surroundings of a b.u.t.terfly catcher; but many prefer the white leno to the green, as the insects are more easily seen in a net of this colour. Yellow is certainly not a desirable tint.

As a rule it will be necessary to kill an insect as soon as it is captured. This is always the case with b.u.t.terflies unless you require to keep them alive either to watch their movements or to obtain eggs. For this purpose you will require a killing bottle or box containing some volatile substance.

The selection of this necessary piece of apparatus is a point deserving of much consideration, for so many different forms are in use by different entomologists, and so many advocates each declare that his own plan is far superior to that of any of the others, that the final decision is not to be worked out in a moment. The best thing for a beginner is to try as many as he can, and then, after some considerable experience of his own, he will be able to decide which apparatus suits himself best.

I recommend this because it is impossible to say of any one plan that it is the best, for that which gives perfect satisfaction to one individual will often fail to give anything but annoyance in the hands of another.

To enable my young readers to follow the advice I have just given, I will describe some of the commonly used killing arrangements and show how they should be used.

I will take first the 'cyanide bottle.' This is a wide-mouthed bottle, containing a very poisonous substance called _cyanide of pota.s.sium_. It is fitted with a good sound cork. The 'cyanide' is a solid substance, and must be fixed in some way or other at the bottom of the bottle so that it cannot shake about and damage the b.u.t.terflies.

[Ill.u.s.tration: FIG. 43.--THE CYANIDE BOTTLE.]

A cyanide bottle can be purchased ready for use at the cost of a s.h.i.+lling or thereabouts; but if you are old enough to be trusted with deadly poisons, you may buy the 'cyanide' of a chemist who knows you well and is satisfied as to your intentions, and then prepare your own.

Every entomologist should know how to do this, for the poison loses its power after some time, and it is not always convenient to leave your bottle in the hands of a chemist or a 'naturalist' to have it recharged.

This will cost you more than it would to do it yourself, but that is nothing compared with the annoyance that may result when, the night before an antic.i.p.ated b.u.t.terfly hunt, you are calmly told that 'your bottle will be ready in a few days.' You can charge it yourself in a few minutes if you can manage to keep a small supply of 'cyanide' in stock, and it is ready for use very shortly after.

Here is the _modus operandi_.--Purchase an ounce or two of the cyanide of pota.s.sium, and immediately put it into a stoppered or well-corked bottle. Label it at once, not only with the name, but also with the word POISON in very large and conspicuous letters. This dangerous chemical is often sold in sticks that look much like certain 'sugar sticks' I was acquainted with in my younger days; but whether this is or is not the case with your cyanide, see that the bottle is kept quite out of the reach of the inquisitive and sugar-loving juveniles of the house.

The quant.i.ty above mentioned is more than you will require for the first 'charge,' but you will soon experience the convenience of having a supply always at hand for recharging when your cyanide bottle fails to do its work expeditiously, or when an accident calls for the somewhat sudden appearance of a new one.