Another species of the same genus has a satiny white hue; but, infinite as they are in number, so most diversified are they in their habits, mode of flight, colours, and markings. Some are yellow, others bright red, green, purple, and blue. Many are bordered or spangled with metallic lines and spots of a silvery or golden lustre. Some have wings transparent as glass.
One of these (the Hetaira esmeralda) is especially beautiful, having an opaque spot on its wings, of a violet and rose hue; and as this is the only part visible when the insect is flying low over the dead leaves of the darker recesses of the forest—where it is alone found—it looks like the wandering petal of a flower.
Of moths, too, there are great numbers,—among them, the Erebus strix, the largest of its family, sometimes measuring nearly a foot in expanse of wing. In the open sunny spots the bright air is often alive with superb dragonflies. Upwards of one hundred species are found near Para. Some live only in the gloom of the forest. Often, however, they are the most beautiful, being more brightly coloured and delicate in construction than the others. Many delight to flit over the igarapes and calm pools.
Among these, the Chalcopteryx rutilans has four wings, each transparent,—while the hind-wings, of a dark colour, glitter with a violet and golden effulgence. They all wage
unceasing war against the day-flying insects. When one is captured, the dragon-fly retires to a tree, and there, seated on a branch, devours the body at its leisure. It is wonderful the number of flies which these beautiful insects destroy. When evening comes on they eagerly fly off to the chase, amid the swamps and around the tree-tops, or wherever their victims congregate.