The racket-tail humming-bird (Discura longicauda) takes its name from the curious form of its tail, the feathers of which are forked,--the two exterior ones being twice the length of the second pair. The colour of the tail is purple-black; the face, throat, and part of the neck light green; while under the chin there is a little velvet-black spot. The upper part of the body is a bronze-green, and a bright buff band crosses the lower end of the back. THE CAYENNE FAIRY. The beautiful little Cayenne fairy (Heliothrix auritus) is often seen flitting among the flowers which adorn the trees near the mouth of the Amazon. It may be known by the snowy-white under part of its body, while the upper surface is of a glossy golden green, extremely light on the forehead. The middle feathers of the tail are blue-black, and the three exterior ones are white. Across each side of the face is a jet-black line, terminated by a small tuft of violet-blue, while below the black line runs a luminous green one. Few of these beautiful little creatures have any voice which rises above a mere twitter. The best songster of the tribe is the Vervain humming-bird, found in the West India Islands. Those on the Amazon are almost mute. Small as they are, they are brave little creatures, and several of the species are tamed without difficulty. Mr Webber describes one of the means by which nature has gifted these little creatures of escaping the observation of their foes. On leaving the spot where a number had perched not far from their nests, he observed them shoot suddenly and perpendicularly into the air till they had got out of sight. After a time, down came the hen-bird, like a fiery aerolite from the sky, upon the very spot where she had built her nest, so rapidly, as almost to escape observation. Different species, of great varieties of form and colour, are found throughout the continent. Although the greater number are confined to particular localities, others have a wide range. The Trochilus forficatus is found over a space of 2500 miles on the west coast, from the hot, dry country of Lima to the forests of Tierra del Fuego, where it may be seen flitting about in snow-storms; as also in the humid climate of the wooded island of Chiloe, where Darwin found it skimming from side to side amidst the drooping foliage. On the mountain heights, in the thick forests and open plains, wherever flowers and insects exist, there one or more species make their home throughout the continent. COTINGAS. Lovely as are the humming-birds, the cotingas, belonging to the order of Passeres, and of which there are several species, almost rival them in beauty of plumage. The crown of one is of a flaming red, abruptly succeeded by a shining brown reaching half-way down the back. The remainder of the back, rump, and tail, the extremity of which is edged with black, is of a lively red. The belly is of a somewhat lighter red, the breast reddish-black, the wings brown.