BIRDS OP NORTH AND MIDDLE AMERICA 



223 



T[ympamichus] pallidicinctus Riugway, Man. North Amer. Birds, 1887, 203. — 

 Petrides, Trans. 7th North Amer. Wildhfe Conf., 1942, 318 in text (age indi- 

 cators in plumage). 



[Tympantichus] pallidicinctus Sharpe, Handhst, i, 1899, 20. — Dwight, Auk, xvii. 

 1900, 163 (molt). 



(?) Tyinpanuchus americamis Lacey, Auk, xxviii, 1911, 206 (Kerrville, Tex., 1885, 

 1886). 



Genus CENTROCERCUS Swainson 



Cenirocercus Swainson, in Swainson and Richardson, Fauna Bor.-Amer., ii, 1831 



(1832), 338, 496. (Type, by monotj'py, Tetrao urophasianus Bonaparte.) 

 Centrocircus (emendation) Swainson, Classif. Birds, i, 1836, 110. 



Large terrestrial Tetraonidae (wing about 266-331 mm.) with tarsus 

 longer than middle toe with claw; internasal portion of culmen longer 

 than apical portion, and tail about as long as wing, strongly graduated, 

 consisting of 18 narrow, attenuated, rigid rectrices ; adult males with 

 an inflatable air sac on sides of neck and with feathers of lower neck, 



Figure 13. — Cenirocercus urophasianus. 



