Obs. This little Flycatcher is of the same general form as the Redstart (_Setophaga ruticilla_) of the United States, and evidently belongs to the same family, though apparently presenting sufficiently distinct generic characters. It has nearer relatives than our northern species, inhabiting Mexico and Central America, very nearly all of which are clothed in plumage of gay and beautiful colors. This bird does not resemble any other species with which we are acquainted in such degree as to render especial comparison necessary, and is very easily recognised. [Illustration: Plate 44 The Texan Guan Ortalida poliocephala (_Wagler_)] ORTALIDA POLIOCEPHALA.—(Wagler.) The Texan Guan. PLATE XLIV. Adult Male. This bird is the only one yet discovered in the United States, of a family of Gallinaceous Birds, of which numerous species are found in the warmer countries of America. Various species inhabit Mexico and Central America, some of which, including that now before us, appear to be readily domesticated, and in Mexico especially, may frequently be seen amongst the usual feathered denizens of the farm-yard. The birds of this group, known by the names of Guans, Curassow birds, and Mexican Turkeys, and the Turkeys proper, are two families of the Gallinaceous birds that are peculiarly American, and not distantly related to each other. Of the Turkeys, two species are known, the most numerous of which is the Wild Turkey of North America. The other, even more handsome in its plumage than the former, has as yet only been found in Central America, and is known as the Honduras Turkey. It is by no means well established that the Domestic Turkey is descended from the wild species of North America. Its origin probably has not yet been discovered. The family to which our present species belongs (_Cracidæ_), contains birds that for the greater part live in the forests, and are remarkable for habitually frequenting trees to a much greater extent than is usual amongst the larger Gallinaceous birds, and constructing their nests in the branches much in the same style as the smaller perching birds. Several species, amongst which is the bird now before us, have very loud and discordant voices. The Curassow Birds (Genus _Crax_) are the best known of this family. They are generally of black or dark red plumage, more or less varied with white, and have very curious and handsome crests, of stiff, recurved feathers. These birds are frequently domesticated in Mexico and the other countries that they inhabit, and a species or two are contained in almost every menagerie of any considerable pretensions in the United States. The species now before us was first noticed as a bird of the United States, by Col. McCall, who observed it in Texas. Since that period, it has been repeatedly obtained by American naturalists either in that country or in New Mexico.