BIRDS—TETRAONIDAE—BONASA. 
629 
coast, but at the present clay 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. 
Catal. 
No. 
Sex 
and age. 
Locality. 
When col¬ 
lected. 
Whence obtained. 
Collected by— 
Length. 
m 
Stretch 
ofwings. 
Wing. 
Remarks. 
435O 
Q 
1854. 
494 Q 
1854. 
jn:n7 
1 firm 
lOOflfi 
5423 
Q 
Oct. 20, 1856 
17.50 
28.00 
8.75 
4541 
Nov. 7,1858 
18.00 
29.00 
9.00 
4540 
19.00 
30.00 
9.00 
10007 
O 
BONASA, Stephens. 
Bonasa, Stephens, Shaw’s Gen. Zool. XI, 1819. Type Tetrao bonasia, L. 
Tetrastes, Keys. & Blas. Wirb. Europ. 1840, p. Ixiv. 
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 Ortyginae. 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 f 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. umbellus. 
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. 
Catal. 
No. 
Species. 
Locality. 
Sex. 
Length. 
Stretch 
ofwings. 
Wing. 
Tail. 
Tarsus. 
Middle 
toe. 
Its claw 
alone. 
Bill 
above. 
Along 
gape. 
Specimen 
measured. 
844 
15.50 
7.21 
6.92 
1.66 
1.85 
0.43 
0.84 
1.06 
18.00 
23.00 
7.24 
0330 
Q 
14.60 
7.00 
5.50 
1.62 
1.90 
0.46 
0.80 
0.90 
Skin .... 
16.50 
23.00 
7.00 
8424 
16 50 
7.30 
6.71 
1.74 
2.42 
0.50 
0.94 
1.00 
9996 
.do. 
Ft. Vancouver, W. T— 
s 
16.30 
7.30 
0.66 
1.70 
2.10 
0.52 
0.95 
1.00 
Skin .... 
do. 
18.00 
23.00 
