Cornish Characters and Strange Events. Baring-Gould Sabine

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СКАЧАТЬ the discoverer of fifty-one parasites, nineteen being new to science and thirty-two new to Britain. In recognition of this work, one of the new species has been named after him Mesoleius Bignellii. The Royal Cornwall Polytechnic Society have awarded him three of their medals, a bronze one for "land and fresh water shells," a silver one for a "collection of British moths," and a second silver medal for "butterflies and moths."

      In the publications of the Ray Society on the Larvæ of British Butterflies and Moths, at the end of each volume we find a list of parasites preying on these beautiful insects, "kindly prepared by Mr. G. C. Bignell, f. e.s."

      One of the most extraordinary features of Mr. Bignell's work is the infinite delicacy wherewith even now at an advanced age he is able to draw and colour his specimens. The miniature painter of a beautiful girl's face a century ago did not take more pains to delineate the object of his admiring study than does Mr. Bignell to obtain a "counterfeit presentment" of some disgusting caterpillar or parasitic insect.

      The hunting for specimens would be an exhausting toil were it not a labour of love. On one occasion Mr. Bignell obtained one hundred and forty-one caterpillars of a certain moth in Whitsand Bay, under Fort Tregantle. They were feeding on henbane, and as he did not know where else to get the right sort of food for them, he had to go out two or three times a week for the food, walking in all a hundred miles. But, alas for the ingratitude of the caterpillars, not a single moth rewarded all this devotion! Yet even this was outdone by a hundred and thirty-five mile walk in the dark to attempt to capture one sort of moth, which perhaps deserves to be mentioned for its elusive ways. It is called the Dasycampa rubiginea, and has to live up to its name. Plym Bridge was supposed to be its haunt, and its time of taking its walks or flutter abroad, night, and that also in midwinter. So night after night in November and December it was stalked, till one night, between the 6th and 7th December, the moth was spotted leisurely sipping honey from the flowers of the ivy growing on one of the pillars of the old gateway leading into Cann Wood between Plym Bridge and Plympton, just as the clock at Morley House was striking twelve.

      A pathetic interest attaches to the large copper butterfly. This splendid species was first discovered in Wales by the celebrated botanist Hudson. It was subsequently captured in considerable numbers about Whittlesea Mere, in Huntingdonshire. Now, alas! it is extinct, and a specimen such as one possessed by Mr. Bignell is worth some pounds. The last secured was in 1847. Greedy collectors and dealers from London, after its discovery, were waiting for it, and offered the country yokels five shillings for every caterpillar secured. Now it is as extinct as the dodo and the great auk.

      There would seem to be no living creature that is not a home and feeding ground for parasites; even the butterflies are infested with them, and probably these parasites also have others infinitely small that attack them.

      Great fleas have little fleas upon their backs to bite 'em,

      And little fleas have lesser fleas – and so ad infinitum.

      One of the most interesting discoveries made by Mr. Bignell is that a creature like a scorpion – but all claw – that is found upon the common house-fly is not a true parasite. It likes a ride, and to do it cheap. And when a fly comes within reach, it lays hold of it with its disproportionately huge claws, clings, and has a ride, free, gratis and for nothing. When it has seen enough of the world and is tired, it lets go and drops off.

      Says Mr. Bignell: "The Blossom Underwing is a moth that was very abundant on the male flowers of the great sallow on April 13th, 1866. Previously this moth was very scarce; but on this night I saw at least a thousand; they were all in pairs, and each pair occupied a flower, a sight never to be forgotten. The fine flowering scrubby oaks were swarming with the larvæ. A friend of mine who kept birds in a very large cage, seeing the abundance of the caterpillars, decided to give his birds a treat; he accordingly gathered about a pint of them, carried them home, and instead of giving the birds two or three at a time, he incautiously put the tin into the cage and removed the lid. At once the caterpillars began to escape, and the seething mass of black and yellow wriggling over the floor, crawling about the wires, so frightened the birds that it caused the death of two of three, which beat themselves against the cage in vain hope to escape from these uncanny horrors."

      As may be well imagined, Mr. Bignell with his lantern stealing up the side of a hedge in the night often enough routed the poachers and sent them flying, thinking they were being watched by a policeman. On one occasion he scared an owl. "I was enjoying myself, on my knees, hunting over the contents of my net that I had used for sweeping the low foliage, to see what captures I had made. My nose and bull's-eye lantern were thrust close to the ground, to prevent anything escaping observation. In the midst of this occupation an owl swooped down to see what was up, when I turned my lantern on him, and away he flew in a mighty hurry, bringing the back of his wings together with great force, like a man clapping his hands. He was evidently in great alarm, and uttered an unearthly scream. It certainly gave me also a turn, it was so sudden."

      All moths with highly pectinated antennæ, that is to say with their feelers comb-like at the extremities, have the most extraordinary power of scenting a female moth at a great distance, even two or three miles, with a favourable wind.

      Mr. Bignell says: "I once had a virgin female of the Oak-egger moth, and was desirous of getting some males. I started off with the lady in a tin box, with a perforated zinc top, to give her air and allow her perfume to escape. I walked through the fields towards Milehouse to where was a turnstile; and at this spot lighted on a weary policeman resting. As it was a dull day, without any token of the sun breaking out, to attract butterflies for their usual gambols, the policeman jeeringly remarked that I had missed the right day. I replied that I thought not, and that I could collect as many as I desired, in fact, I could make them come to me. He laughed incredulously. I then took out my tin box and placed it on the wall, and, magician-like, whistled and waved my hand. The policeman stared, and thought I was befooling him. But lo, in two or three minutes one male alighted close to the box, soon followed by others, and in a quarter of an hour I had at least fifty, and so tame that I picked them up with my fingers and distributed them among about a dozen people who had gathered to see what I was about. The policeman stared with open eyes and mouth, quite satisfied that my whistle and mysterious signs in the air with my hand had called the insects to me. Satisfied with what I had got I waved again and bade the moths depart, and clapped the box in my pocket. Next day I took the empty box out with me into the country. I had several males following me, and some actually penetrated into my pocket where was the empty box, proving that the perfume still remained in it, though wholly imperceptible to myself."

      On one occasion Mr. Bignell and a friend set out at night to find the beautiful moth Heliophobus hispidus, knowing its haunts, between the south side of the Plymouth citadel and the sea, where it is to be found in September or October resting on the grass.

      Accordingly, each furnished with a bull's-eye lantern, they visited the locality, but it was some time before one was discerned, and that was on a blade of grass overhanging the cliff and out of reach, a sheer drop of twenty feet at least into the sea fretting and moaning below. Loath to miss it, as its eyes shone like two rubies – in fact, both saw those glistening eyes before they observed that they were in the head of the moth – they arranged that one should lie flat on his stomach, and that Mr. Bignell should sit down, dig the heels of his boots into the turf, then take his friend by the legs and thrust him over the edge of the cliff, so far as to enable him to box the moth, whilst holding the handle of his lantern between his teeth. This was done, and the Heliophobus was secured.

      But, after all, it is in the direction of parasites living upon insects that Mr. Bignell has made the greatest research. He is the possessor of a unique collection of the parasites that live on the aphis, and also of the hyper-parasite which preys upon that parasite. The life-history of this insect was unknown till Mr. Bignell detected a hyper-parasite pierce the aphis which was itself a parasite. The specimen was secured, and from it was bred the hyper-parasite itself.

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