230 U. S. P. R. R. EXP. AND SURVEYS — ZOOLOGY — GENERAL REPORT. 
One specimen, 4469, differs in a decided tendency to white about the throat and neck ; the 
feet are darker, the claws shorter, stouter, and more curved. The specimen is not in suffi- 
ciently good order to show whether this whiteness of the throat is characteristic or an indica- 
tion of a tendency to albinism. It may be proper to remark, however, that most of the Old 
World species are characterized by the white throat. 
Skins from Fort Massachusetts differ from the others in having the bill entirely black ; the 
other characters are very similar ; the colors generally are purer, the feathers being less edged 
with paler. 
List of specimens. 
S5 
| 
5 
Sex. | 
Locality. 
When col- 
lected. 
■ Whence ob- 
tained. 
Collected by— 
1 
J 
Stretch of 
wings. 
Wing. 
Tail. 
Tarsus. 
Middle toe. 1 
Its claw 
alone. 
Bill above. | 
Alonggape. I 
Specimen 
mea-ured. 
2841 
2862 
S, F. Baird 
do 
8121 
7099 
2 
St. Mary's R. mountains.... 
Oct. 13,1853 
Gov. Stevens.. 
Dr. Geo. Suckley... 
8.50 
12.50 
3.75 
4469 
8120 
Cascade mountains, O. T... 
Lt. Williamson. 
3 
.... 
8496 
8495' 
S 
a 
Fort Mass. N. M 
Mar. 31,1856 
Mar. 27,1856 
Dr. Peters 
do 
7.50 
8.00 
11.00 
3.88 
2.44 
1.18 
1.10 
0.26 
0.74 
0.96 
8117 
Dr. Henry 
7.O0 
3.90 
2.40 
1.20 
1.10 
0.76 
1.04 
* Eyes light brown. 
