Attacus cecropia.–During the winter months, when the apple trees are leafless, the large cocoons of the Cecropia moth may be found here and there, firm1y bound to the twigs, and occasionally I have seen them on young trees attachcd to the stock near the ground. They are about and are entirely constructed of silk, the fibres of which are very much stronger than those of the common silk worm Bombyx mori. This silk has been worked to a limited extent and manufactured into socks and other articles, which have been found very durable; but a drawback to the advancement of this branch of industry lies in the fact that the caterpillars do not bear confinement well, and hence are not easily reared.