BIRDS — TETRAONIDAE — BONASA. 



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coast, but at the present day it is only found, and that very sparsely, on the Pocono mountains 

 of Pennsylvania, on Long Island, and on various other tracts of sea coast and island as far east 

 as Maine. 



List of specimens. 



BONASA, Stephens. 



Bonasa, Stephens, Shaw's Gen. Zool. XI, 1819. Type Telrao bonasia, L. 

 Tttrastes, Kets. & Blas. Wirb. Europ. 1840, p. l.\iv. 



Ch. — Tail widening to the end, its feathers very broad, as long as the wings ; the feathers soft, and eighteen in number. 

 Tarsi naked in the lower half; covered with two rows of hexagonal scales anteriorly, as in the Orlyginat. Sides of toes 

 strongly pectinated. Naked space on the side of throat covered by a tuft of broad soft feathers. Portion of culmen between 

 the nasal fossae about one third the total length. Top o*^ head with a soft crest. 



This genus, in its partly naked tarsi, with two rows of scutellae anteriorly, indicates a close 

 approach to the American partridges, or quails. It has a single European representative. 



There seems a strong probability that the Pacific coast species is different from the Atlantic. 

 The diagnosis will be as follows : 



Common characters. — Sexes nearly similar. Colors reddish or gray, white and black. Tuft 

 on the sides of neck velvety black. Tail with a sub-terminal brown bar. Sides banded trans- 

 versely with brown ; back with cordate spots of grey. 



Colors pale. Bands on the sides of body obscure brown. Under tail coverts white. 



Middle toe without claw shorter than tarsus B. uinhellus. 



Colors very dark. Bands on the sides sharply defined dark brown. Under tail coverts 

 rufous, with terminal white spots. Middle toe without claw apparently longer than 

 tarsus B. sabini. 



Comparative measurements of species. 



