Colors. Head above and space on the throat, black; cheeks and sides of the neck white, the latter color nearly meeting on the back of the neck. Entire plumage above cinereous with a brownish tinge, plumage beneath only white, with touches of yellowish brown on the sides and flanks. Quills edged externally with white, outer tail-feathers edged also with the same color, which on the external feather occupies the entire outer web. Bill and feet dark. Hab. Missouri and Utah, Rocky mountains. Spec. in Mus. Acad. Philada., and Nat. Coll. Washington. Obs. This is the largest American species of the genus Parus (as restricted by late naturalists), and is particularly remarkable for its lengthened tail. It is a distinct and well-marked species, related to _P. atricapillus_ and _P. carolinensis_, but easily distinguished from either by the characters above mentioned. QUERQUEDULA CYANOPTERA.—Vieill. The Red-breasted Teal. PLATE XV.—Male and Female. This handsomely colored and elegant little Teal, is of frequent occurrence in Western America, though first noticed as a North American species in Louisiana, by E. Pilaté, M. D., a physician and naturalist, residing at Opelousas in that State. In a communication to us accompanying one of the first specimens obtained by him and intended for the collection of the Philadelphia Academy, that gentleman mentions having occasionally seen it in company with other species of ducks, but regards its appearance as unusual in Louisiana. The specimen alluded to, which is that of a male in very fine spring plumage, is now in the collection of the society mentioned. According to Dr. Pilaté, who has paid much attention to Natural History, this bird associates with other small species of water-birds, and appears to possess, in the migrating season, similar habits, and frequents the same places of resort, though rather unusually shy and vigilant. Our valued friends Capt. Howard Stansbury, of the U. S. Topographical Engineers, in his able Report of a Survey of the valley of the Great Salt Lake of Utah, and Prof. Spencer F. Baird, of the Smithsonian Institution, in a valuable Zoological appendix to that Report, allude to this Duck as commonly met with in Utah, and especially in the vicinity of the Great Salt Lake. It was observed frequenting the rivers and small streams. The collection brought home by Capt. Stansbury containing many objects of the highest interest and scientific value, which are described with his usual great accuracy in Prof. Baird’s Appendix, is now in the National Museum at Washington city. The specimens of the present bird were obtained in the river Jordan, a stream emptying into the Lake, and so named by the settlers in that region, who are principally of the religious denomination of Mormons. [Illustration: Plate 15 The Red-breasted Teal Querquedula cyanoptera (_Vieillo_)]