646 



U. S. p. R, R. EXP. AND SURVEYS — ZOOLOGY — GENERAL REPORT. 



List of specimens. 



CALLIPEPLA, Wagler. 



CaUipepla, Wagler, Isis, 1832. Type Ortyx squamata, Vig. 



Ch. — Head with a broad short depressed tufted crest of soft thick feathers springing from the vertex. Other character as 

 in Lophortyx. 



The single United States species is of a bluisli tint, without any marked contrast of color. 

 The feathers of the neck, breast, and belly, have a narrow edging of black. 



CALLIPEPLA SQUAMATA, Gray. 



Scaled or Blue Partridge. 



Orlyx sqiiamatus, Vigors,;Zoo1. Jour. V, 1830, 275.— Aeert, Pr. A. N. Sc. Ill, 1847, 221 . 



Callipepla squamata, Geat, Gen. HI, 1846, 514.— M'Call, Pr. A. N. Sc. V, 1851,222.— Cassin, III. I, v, 1854, 129 ; 



pi. six. — Gould, Men. Odont. pi. xix. 

 Callipepla strenua, Wagler, Isis, XXV, 1832, 278. 



Tetrao cristata, De la Llave, Registro trimestre, I, 1832, 144. (Cassin.) 

 Sp. Ch. — Head with a full broad flattened crest of soft elongated feathers. Prevailing color plumbeous gray, whitish on the 

 belly, the central portion tinged with brownish ; the exposed surface of the wings tinsed with light yellowish brown, and very 

 finely and almost imperceptibly mottled. Head and throat without markings, light grayish plumbeous, throat tinged with 

 yellowish brown. Feathers of neck, upper part of back and under parts generally, except on the sides and behind, with a 

 narrow but well defined margin of blackish, producing the effect of imbricated scales. Feathers on the sides streaked centrally 

 with white. Inner edge of inner tertials, and tips of long feathers of the crest, whitish. Crissum rusty white, streaked with 

 rusty. Female nearly similar. Length, 9.50 ; wing, 4.80 ; tail, 4.10. 



flab. — Valley of Rio Grande of Texas. Not yet detected farther west. Most abundant on the high broken table lands and 

 mezquite plains. 



In this species the elongated tertials reach nearly to the tip of the tail, which is long and 

 graduated, the lateral feathers much narrower and an inch shorter than the middle. The white 

 inner margins to the inner tertials constitute a straight line down the rump, and are bordered 

 on tlie side next the shaft by a dusky line. The rump, tail coverts, and upper surface of tail 

 are of a less pure lead color than the fore back, and absolutely mottled like the tertials. The 

 pale reddish brown tinge along the middle of the belly, also pervades the scale-like margins of 



