But so it is, for both of them, the Stag-beetle on land and the Great Water Beetle in the ditch, eat scarcely anything at all, and, when they do eat, are quite content to suck the juices out of plants. One reason for these big beetles eating so little is, I think, the very long time which they have for feeding while they are caterpillars--beetle caterpillars, by the way, are always called "grubs" or "larvæ," and beetle chrysalises are called "pupæ." The grubs of the Stag-beetle live on decaying wood (you may sometimes find them at the bottom of an old gate post which has decayed under the ground), and take three or four years to become "full-fed." The grub of the Great Water Beetle spends all his time (three or four years, too, I expect) in the water, and I think he feeds on decaying plants, but I am not sure of this. Some people say that the Stag-beetle uses his great antlers to crush twigs and leaves so as to get the juice. This may be so, but I have never seen him do it. [Illustration: THE MUSK BEETLE Who has a very nice smell] Another big and beautiful insect is the Musk Beetle. As you see in the picture, he has very long horns and a narrow body. He is a beautiful bronze green all over, and must be a wonderful sight when he is flying in the sunshine. I have never seen him fly myself, but people who have say that his legs and horns stream out behind him, so that he must look like a little green Heron. Perhaps the most wonderful thing about him, however, is his scent. I expect most of you know those little round pink sweets which are called "cachous." He smells just like the taste of those, and that is why he is called Musk Beetle. Another big beetle I have to show you is the Cockchafer. You must look at his picture carefully, because it shows you how a beetle lifts up his hard wing-covers when he is going to fly. Some beetles, the Burying Beetle for one, turn these wing-covers almost upside down when they are flying, so that the hollowed side is uppermost. I expect that this helps to keep them up when they are flying, and perhaps it helps them to start as well. [Illustration: THE COCKCHAFER RAISING ITS WING-COVERS JUST BEFORE TAKING FLIGHT]