the surface of the sand by jerking himself backwards and flinging the sand away with his flat head and closed forceps, which form a kind of shovel. Each circle is smaller than the last, until the pit is like an inverted cone, and the ant-lion lies buried at the bottom, only his forceps being visible. When an ant has fallen headlong down into the pit it makes frantic efforts to escape, and if the ant-lion sees that it is likely to get beyond his reach, he then with his forceps flings some sand at it with such unerring aim the poor victim is sure to roll over and over until it reaches the jaws of its captor, who feasts upon it and then flings the remains of the body out of the pit.
One difficulty was how to ensure a supply of ants, but this was overcome by filling a box with part of an ants' nest, and as these insects settled down and seemed content with their quarters, they were ready when wanted, and three times a day the lions had to be fed! One learns to sacrifice one's feelings in the cause of science, but to the last it was a real distress to me to have to put the poor little ants where they would be devoured; but Nature is cruel, and from the real
