Feathers of the crown elongated; two tufts of lanceolate elongated feathers on the sides of the neck, under which is an oblong bare orange-coloured space on either side, capable of being inflated; tail very short, much rounded, of eighteen feathers. Male with the upper parts blackish-brown, transversely marked with broad undulating bands of light yellowish-red; wing-coverts and secondaries of a lighter brown, tinged with grey, and barred with pale red: primary quills greyish-brown, with black shafts, and spots of pale reddish on the outer webs, tail dark brown, narrowly tipped with dull white, the two middle feathers mottled with brownish-red; loral space, a band from the lower mandible over the cheek, and the throat, pale yellowish-red; a band of blackish-brown under the eye; extending to the ear-coverts, and another on the side of the throat; cervical tufts, with the feathers dark brown on the outer webs, pale yellowish-red and margined with dusky on the inner; lower parts greyish-white, tinged with yellow on the sides, with large transverse curved bands of greyish-brown; lower tail-coverts arranged in three series, dusky at the base, white at the end; tibial and tarsal feathers grey, obscurely and minutely banded with yellowish-brown. Female considerably smaller, without the crest, cervical tufts, or air-bags, but otherwise similar to the male. _Male_, 18, 27-1/2. Abundant from Texas throughout all the western prairies, to very high up the Missouri, Kentucky, Illinois, and Ohio. Almost extirpated in the Middle and Eastern Districts. Resident. Pinnated Grouse, Tetrao Cupido, Wils. Amer. Orn. v. iii. p. 104. Tetrao Cupido, Bonap. Syn. p. 126. Pinnated Grouse, Nutt. Man. v. i. p. 662. Pinnated Grouse, Tetrao Cupido, Aud. Orn. Biog. v. ii. p. 490; v. v. p. 559. **** Toes partially feathered. Tail graduated. 299. 5. Tetrao Urophasianus, Bonap. Pheasant-tailed Grouse.--Cock of the Plains. Plate CCCLXXI. Male and Female.