Then too, you cannot collect and keep them as you can the butterflies or beetles, in fact this strange horned beast is still unnamed because its carcass shriveled and faded until it bore so little resemblance to its living self that it could not be identified. It is quite unlike the hickory borer or horned devil, being dark red-brown in color. It takes a skilled taxidermist entomologist to squeeze them out, blow up the skin and mount them in a case, and that is the only way to keep these forms, unless we have found another way in these photographs of them. [Illustration] A CATERPILLAR DEVOURED BY A FUNGUS (_Apantesis nais attacked by Empusa sp._, Dru.) One cold morning in early autumn I saw this caterpillar lying so still on the grass stem on which you see it that I thought I could photograph it before it woke up. I picked the grass panicle, but when I came to look closely at the caterpillar I found it was a shriveled corpse and that there were gaping wounds in its sides, filled with the threads of a parasitic fungus; a fungus familiar to me through one of its distant relatives which I spent six months of my life studying, and which lives in the intestines of the frog. There is something ghastly about the slow but resistless working of a fungus in the body of a caterpillar. One cannot help wondering where the plant got in and how the caterpillar felt about it. Was there the horror of finding that it could not be dislodged and the hopelessness of the struggle against it and the impending death and shortening of an already very brief existence? So these, and seemingly all other creatures, have their diseases, and the studies which men have made and are making upon them in all parts of the world are helping us to understand the causes of those which attack and often conquer human beings. NERVE-WINGED INSECTS (_Neuroptera_) There was a time before all living things were classified, when there were no groups of plants or animals or insects. It is something to be proud of that man has grouped the likes together and formed, out of the chaos of living species, a system into which most of them can go like letters into pigeonholes. Is it any wonder that with half a million species in this insect world there should be some groups in which the species forming them seem to have very little likeness to each other? The nerve-winged insects seem to form just such a group, for the principal things they have in common seem to be peculiar nerve-veined wings and blood-thirsty habits. If we could be quite sure that dragon-flies and scorpion-flies and caddis-flies preyed only upon our foes, we could say with more confidence than we do now, that they are our friends and not our enemies, and that men should find some means by which to help increase the number of them in the world.