Many kinds of spiders run with ease upon the surface of ponds and ditches, and one forms a kind of raft of a few dead leaves woven together, on which it sits and is blown by the wind hither[p. 172] and thither, and thus is enabled to prey upon various aquatic insects.
The surface of grass lawns may be seen on autumnal mornings covered with tiny webs gemmed with dew. We may therefore estimate the immense number of flies captured by these traps so thickly spread over the grass, and see in them another proof of the adaptation of each created thing for its special purpose, and how wonderfully the balance of nature is maintained, so that one creature keeps another in check, and all work harmoniously together, according to the will of our great Creator.
