The central part of South America affords a home to this most exquisitely-ornamented little bird. "If any one species of this extensive family be better known than any other," says Gould, "it is undoubtedly the Ruby and Topaz Humming Bird, for it is not only one of the earliest discovered, but its beauty is of such a character as to fix at once the attention of every observer. It is also one of the commonest of the entire group, and plays no inconsiderable part in commerce, as the capturing and preparing specimens, which are sent home by thousands, affords considerable employment to the Brazilian slaves and others in its native country; moreover, in Europe and elsewhere, this species always forms a conspicuous object in the groups of birds arranged under glass shades. But, alas! nothing is known as to its manner of life, for though it has been described for more than a hundred years, and its native country repeatedly visited by enterprising explorers, no one of them has placed on record any details as to its habits. It is said to perch occasionally, and spread its large, rounded tail to the fullest extent, like the Peacock. The cup-shaped nest is also known to be composed of cottony material, and decorated externally with leaves and small patches of lichens." * * * * * The FLOWER-NYMPHS (_Florisugus_) are for the most part powerfully formed and large Humming Birds, with a short tail, scarcely exceeding the closed wing in length. The strong beak is not incised, and the sexes differ more or less in their coloration. Some of them appear to be migratory; at least, they would seem to approach the tropic during the colder parts of the year, and to retreat before the returning heat, thus maintaining an equable temperature. THE BRAZILIAN FAIRY. The BRAZILIAN FAIRY (_Heliothrix auriculata_), a species inhabiting Brazil, has an awl-shaped, delicate beak, small feet, furnished with short, curved claws, long, slender wings, and a long tail, formed of narrow feathers; the tail of the female is composed of broad feathers, and rounded at its extremity. In the adult male, the back and sides of the throat are bright copper-green, with a golden shimmer, and the greyish black quills glow with violet; the under side and three exterior tail-feathers are white, whilst those in the centre of the tail gleam with a steel-blue lustre; a line of velvety black commences beneath the eyes, and passes along the body, expanding as it goes, and gradually merging in a blueish border that surrounds it. The male is six inches and three-quarters long, with a tail of two inches and a half; the body of the female measures four inches and a half, and her tail one inch and seven-twelfths. This beautiful bird is rare in Brazil, and in Guiana is replaced by a very similar species; it has also several representatives in the western parts of South America.