PAUUS. 



83 



belongs, yet remains to be determined, and to wliieli, if any, a new 

 name is to be given. 



The Parus sibiricus, of Europe, is very similar in coloration and 

 characters to the P. hudsonicus. The principal difference is seen in 

 the cheeks, which in sibi?-icus are pure white, this color extending 

 along the entire side of the neck, widening behind, and extending 

 round towards the back. In hudsonicus the cheeks behind the eyes 

 and sides of neck are ash gray, the white being confined to tlie region 

 below or near the eye. The smoky gray of the upper part of head 

 and neck in sibiricus is in a stronger contrast with the brighter 

 rufescent gray of the back, and is separated from it by an obscure 

 concealed whitish dorsal half collar, represented in hudsonicus only 

 by a dull grayish shade in the plumage. 



Parus rufescens. 



Parus rufescens, Townsend, J. A. N. Sc. Phil. VII, n, 1837, 190.— Add. 

 Orn. Biog. IV, 1838, 371, pi. 353.— Ib. Birds Am. 1841, 158, pi. 129. 

 —Baird, Birds N. Am. 1858, 394.— Coopek & Suckley, P. R. R. Rep. 

 XII, II, 1859, 194 (nestiug).— Sclatek, Catal. 1861, 14, no. 86.— 

 PcBcila rufescens, Bonap. Consp. 1850, 230. 



Hab. Western United States near Pacific coast. 



