ball of weeds about three inches in diameter, probably held together by slight silken cords, it is wafted along the surface of the water upon this floating island, which it quits the moment it sees a drowning insect. The booty thus seized it devours at leisure upon its raft, under which it retires when alarmed by any danger[1]." In the spring of 1830, Mr. Rennie found a spider on some reeds in the Croydon Canal, which agreed in appearance with Mr. Shepherd's.
Among our native spiders there are several, which, not contented with a web like the rest of their congeners, take advantage of other materials to construct cells where, "hushed in grim repose," they "expect their insect prey." The most simple of those spider cells is constructed by a longish-bodied spider (Aranea holosericea, Linn.), which is a little larger than the common hunting spider. It rolls up a leaf of the lilac or poplar, precisely in the same manner as is done by the leaf-rolling caterpillars, upon whose cells it sometimes seizes to save itself trouble, having first expelled, or perhaps devoured, the rightful owner. The spider, however, is not satisfied with the tapestry of the caterpillar, but always weaves a fresh set of her own, more close and substantial.
Another spider, common in woods and copses (Epeira quadrata?) weaves together a great number of leaves to form a dwelling for herself, and in front of it she spreads her toils for entrapping the unwary insects which stray thither. These, as soon as caught, are dragged into her den, and stored up for a time of scarcity. Here also her eggs are deposited and hatched in safety. When the cold weather approaches, and the leaves of her edifice wither, she abandons it for the more secure shelter of a hollow tree, where she soon dies; but the continuation of the species depends upon eggs, deposited in the nest before winter, and remaining to be hatched with the warmth of the ensuing summer.
The spider's den of united leaves, however, which has just been described, is not always useless when withered and deserted; for the dormouse usually selects it as a ready-made
- ↑ Kirby and Spence, Intr. i. 425.
