In a paper in the “Registro Trimestre,” I. p. 144 (Mexico, 1832), Don Pablo de la Llave, an able Mexican naturalist, gives a description of this bird, and names it _Tetrao cristata_. He had kept it, with other species, in captivity, and of his notice of it we give the following translation: “The second species is considerably smaller than the preceding,” (_Tetrao marmorata_, Llave, which is _Ortyx macroura_, Jardine and Selby). “It has on its head a crest of feathers very erect and soft, bill black, the neck moderate, body elongated, much compressed, feet robust, gray or blackish, small, and have, more than in _Tetrao_, the appearance of the Larks or Buntings. It is almost entirely of a lead color, with the feathers of the breast speckled with black, and those of the sides with many longitudinal bands of white. Its voice is very much varied, and that of the male is loud, sounding like a castanet, at the same time raising and depressing its head. “I have not observed in this bird any courage;—it is very timid; all its movements are rapid, and notwithstanding that I have fed my specimens for a long time, every day they become more wild and intractable. “It inhabits the _Mezquite_ regions in Northern Mexico.” The contents of the stomachs of Capt. French’s specimens were hemipterous insects, some of which were very minute, with a few seeds and pods. Our plate represents the male and female, which are nearly alike in plumage, about two-thirds of the size of life. DESCRIPTION AND TECHNICAL OBSERVATIONS. Genus Callipepla. Wagler in Isis, 1832, p. 277. Callipepla squamata. (Vigors.) Ortyx squamatus. Vig. Zool. Jour., V. p. 275. (1830.) Callipepla strenua. Wagler, Isis, XXV. p. 278. (1832.) Tetrao cristata. Llave, Registro Trimestre, I. p. 144. (1832.) Form. Robust, body compressed; head with long, erectile, crest-like feathers; bill rather strong, curved; wings short, with the fourth quill slightly longest, tertiaries long; tail rather long, ample, rounded; legs and feet moderate; tongue pointed, very acute at the tip; nostrils large. Dimensions. Total length of skins, 8½ to 9 inches; of specimens in spirits (from Capt. French), 10 inches; wing, 4½; tail 3¼ inches.