The megasominae is of an enormous size, as is also the beautiful Inca beetle. Among the most beautiful beetles in the Brazils is the diamond beetle (Entrinus nobilis), of a lustrous azure green, and with golden wings. With it, and other species, the ladies form necklaces, and ornament their dresses. In Venezuela, the cactus plants, which grow so abundantly, serve to nourish the valuable though odd-looking little coccus cacti. The male and female differ greatly. The female resembles a Lilliputian tortoise, and is of a dark brown colour, with two light spots on the back covered with white powder. The male, possessed of a pair of wings, is much smaller, and roves about at will from plant to plant. The female, a short time after she has become full-grown, secures herself to a leaf, where she remains immovable. She now grows to such a size, that she more resembles a seed belonging to a plant than an insect, all her limbs being completely concealed by her wide-expanded body. In process of time, before the young insects are born, the cochineal-gatherers detach the insect by means of a knife dipped in boiling water, which kills them. They are then dried in the sun, and appear like small dry berries of a deep mulberry colour. SPIDERS. Fear-inspiring is the appearance of the great crab-spider--the Mygale avicularia, one genus of the formidable Arachnida family--with a body two inches in length, and, when the legs are expanded, seven inches across, covered entirely with coarse grey, reddish hairs. It lives among the rocks in the drier regions; some dwell under stones, others form artistic tunnels under the earth, and some build their dens in the thatch of houses. Bates one day saw some Indian children with one of these monsters secured by a cord round its waist, by which they were leading it about the house as they would a dog. The hairs with which it is covered come off when touched, and cause a peculiar and almost maddening irritation. This is, however, probably owing to their being short and hard, and thus getting into the fine creases of the skin, and not to any poisonous quality residing in the hairs. These monstrous spiders prey on lizards, small birds, and other diminutive vertebrates. Their muscular power is very great. When the creature is about to seize its prey, it fixes its hind-feet firmly in the ground, and lifting up the front ones, darts them forward, and fastens them with the double hooks which terminate its feet between the cranium and the first vertebra, thus preventing the possibility of their escaping. Nothing will then tear it from its prey. When pressed by hunger, it climbs at night the trees and shrubs in which humming-birds and other small birds are perched, or have built their nests, and springing on them, grasps them with its powerful claws. It seizes the anolis, a kind of water-lizard, in the same way. The fact of its seizing on birds, so