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. The life-story of the aphis, that tiny green pest that infests the roses, has been unrolled by this enthusiastic student, and is full of surprises. The ichneumon fly as well has been watched, and all its wicked acts recorded. Caterpillars, so fat and fleshy, form a delightful feeding ground for the deposit of eggs, and serve as luscious food for the young to pasture upon. We human beings, in common with all mammals, have the obligation imposed on us of nourishing our own young, and with some of us we go on sustaining them till we are exhausted in the process, but the ichneumonidæ are more clever than we. They make others, notably the caterpillars, maintain their young, and the frivolous mothers, after having once deposited their eggs, gad about and enjoy themselves as having no concern for their future well-being. It is a comfort to reflect that the insects thus preyed upon do not seem to suffer much, if at all, and it may almost be said that they exhibit a maternal regard for the young bred out of their bodies. With his wonderful microscopes Mr. Bignell can explore far down the ladder of life, but whether to its lowest rung may well be doubted. There is always some living being to be found preying on the last of the minutest creature last seen. After a visit to Mr. Bignell's house in Saltash with a friend, I turned to him and said: "I came here believing myself to be an Individual. I leave knowing myself to be a Community." SIR JOHN CALL, BART.