The dragons lay rather quietly on the sand at the bottom of Monday Pond most of the time. Sometimes one would be up a little way on the shore, that is, the side of the tub, or clinging to one of the plant-stems. When poked with a pencil,--and we were fearless about poking them, if the pencil were a long one,--they would half-walk, half-swim away. But mostly they lay pretty well concealed, waiting for something to happen. What would happen occasionally was this: a young May-fly or a water-beetle would come swimming or walking along; if it passed an inch away from the dragon, all right; but if its path brought it closer, an extraordinary "catcher," rather like a pair of long nippers or tongs, would shoot out like a flash from the head of the dragon and seize on the unfortunate beastie. Then the "catcher" would fold up in such a way as to bring the victim against the dragon's mouth, which is provided with powerful, sharp-toothed jaws. These jaws then had their turn. And that was the end of the May-fly. Mary was rather shocked when she saw the dragon first use its "catcher." She wanted to rescue the poor May-fly. But after all she has got pretty well used to seeing tragedies in insect life. They seem to be necessary and normal. Many insects depend upon other animals for food, just as we do. Only fortunately we don't have to catch and kill our own steer or pig or lamb or chicken. We turn the bloody business over to men who like--well, at least, who do it for us. But in the world of lower animals each one is usually his own butcher. Mary soon wanted to see the dragon's "catcher," and so we dredged one out of Monday Pond, and put him on the study-table. As he faced us with his big eyes glaring from his broad heavy head, he looked very fierce. But curiously enough, he didn't seem to have any jaws; nor even a mouth. The whole front of his face was smooth and covered over by a sort of mask, so that his terrible jaws and catching nippers were invisible. However, we soon understood this. The mask was the folded-up "catcher" so disposed that it served, when not in use, actually to hide its own iniquity as well as that of the yawning mouth behind. Only when some small insect, all unsuspecting this smooth masked face, comes close, do the long tongs unfold, shoot out, and reveal the waiting jaws and thirsty throat. A veritable dragon indeed; sly and cruel and ever hungry for living prey.