Sometimes he lay on the surface of the sand, with a few grains scattered over his back to conceal him from notice, and his jaws extended on the surface.

If a fly was put into the bot- tle it would circle around it, close to the glass, and usually run over the ant-lions back.

He would jerk up his head, and attempt to seize it, which he seldom succeeded in doing the first time.

If he caught a leg or wing he was unable to move nearer, and shorten his hold, and the fly escaped.

He would often throw up the sand and try to undermine the fly.