66 ALLEN'S NATURALLST'S LIBRARY. 



Tympanuchus pallidicinctus, Ridgw. P. U. S. Nat. Mus. viii. 

 p. 355 (1885); Bendire, Life Hist. N. Am. B. p. 96 

 (1892); Ogilvie-Grant, Cat. B. Brit. Mus. xxii. p. 80 



(1893)- 



Adult Male. — Distinguished by the longer feathers of the 

 neck-tufts, these being parallel-edged and square-tipped ; chest- 

 feathers white, with three brown bars^ narrower than the white 

 interspaces. Total length, 15 inches; wing, 8-3; tail, 3-5; 

 tarsus, I '6. 



Adult Female. — Differs from the male in having the neck- 

 tufts much shorter, and, as in the female of T. americanus^ the 

 outer tail-feathers are barred with buff. Measurements a trifle 

 less than those of the male. 



Range. — South-western Kansas, Western Indian Territory, 

 Western, and probably Southern, Texas. 



The range of this smaller and paler-coloured species is still 

 imperfectly known, but its nesting habits appear to be very 

 similar to those of T. americanus. 



THE SAGE GROUSE. GENUS CENTROCERCUS. 



Centrocercus, Swains. Faun. Bor.-Amer. ii. pp. 342, 496 (1831). 



Type, C. nrophasianus (Bonap.). 



Toes naked and pectinate along the sides ; tail long and 

 Pheasant-like, composed of twenty wedge-shaped pointed fea- 

 thers, the outer pair being less than two-thirds the length of 

 the middle pair. The males have an inflatable air-sac on each 

 side of the neck. Only one species is known. 



I. THE SAGE GROUSE. CENTROCERCUS UROPHASIANUS. 



Tetrao nrophasianus^ Bonap. Zool. Journ. iii. p. 213 (1828); 



id. Amer. Orn. iii. p. 55, pi. xxi. fig. i (1828). 

 Tetrao {Centrocercus) urophasianus, Swains. & Richards. Faun. 



Bor.-Amer. ii. p. 358, pi. 58 (1831). 



