242 
U. S. P. R. R. EXP. AND SURVEYS-ZOOLOGY-GENERAL REPORT. 
shorter than the middle ones. The fourth quill is longest ; the first shorter than the fifth. 
The legs are long and of a yellow color. 
I have not found any specimens of this species agreeing with the Trichas personatus of Swainson 
as distinguished from his T. hr achy dactylics. All before me have the short lateral toes dis¬ 
tinguishing the latter species. Should, therefore, there be really two, as suggested by Swainson, 
the new one will be that to which he has assigned the name of personatus. 
Among the specimens before me are several males in autumnal or winter dress in which the 
entire crown is pale reddish olive, except a very narrow black frontlet. The black of the cheeks 
is also considerably obscured. This agrees with the Sylvia roscoe of Audubon. There is a 
slight trace only of the conspicuous white ring round the eye, shown in the figure of roscoe , 
this is characteristic of the female ; nor is the olive of the back so dark. 
Specimens from the west appear larger than eastern ones, and the hoary suffusion back of 
the black on the head is more sharply defined and whiter. One skin from Kacine has the 
belly yellower than usual, and thus more like G. velatus. 
This species is readily distinguishable from G. macgillivrayi and Philadelphia in the adult 
dress. The female and immature specimens of the latter may be distinguished by the bright 
yellow of the whole under surface of body and tail coverts, and the gray tinge on the neck and 
throat without the decided yellow of G. trichas. 
List of specimens. 
Catal. 
No. 
Sex and 
age. 
Locality. 
When col¬ 
lected. 
Whence obtained. 
Orig’l 
No. 
Collected by— 
Length. 
Stretch 
of wings. 
Wing. 
Remarks. 
2178 
April 30, 1845 
4.75 
6.9L 
2.25 
0093 
May 20, 1845 
5.C8 
6 66 
2 25 
2572 
May 4, 1846 
5.16 
7.08 
2 17 
2656 
O 
May 12, 1846 
5.08 
7.08 
2.17 
2535 
O 
fL 
April 30, 1846 
5.50 
7.43 
2 43 
2215 
O 
<? 
O 
5.08 
7 25 
2.25 
385 
5.00 
6.91 
2303 
V 
n 
5.08 
6 91 
2.16 
1105 
V 
July 5, 1843 
4.75 
6.50 
2.00 
703 
V 
Washington. D. C. 
April 25, 1842 
C) 
8655 
5.25 
7.00 ■ 
2.25 
7370 
•••••'•• 
7922 
A 
5825 
O 
A 
Dr. P. R. Hoy.. 
10152 
O 
May 15, 1857 
8313 
0 
s 
Independence, Mo. 
May 27, 1857 
Win. M. Magravv... 
30 
Dr. Cooper .... 
5.00 
6.37 
2.12 
Iris brown ; bill black; 
feet flesh color. 
3990 
4.50 
2.00 
3992 
4.50 
6.50 
2.00 
4674 
fA 
May 15. 
5.37 
7.00 
2.50 
4675 
O 
May 12. 
4.~5 
7.00 
8836 
A 
2.25 
7.12 
2.25 
8834 
O 
-A 
5.25 
7.00 
2.25 
8837 
O 
5.00 
7.00 
2 25 
8835 
0 
4.75 
0.75 
2.25 
5304 
0 
8227 
0 
Fort Laramie, Neb. 
Sept. 17,1855 
Win. M. Magravv.. 
209 
Dr. Cooper ... 
4.75 
6.75 
2.25 
Iris brown ; feet pale 
brown. 
7915 
j' 
327 
5.87 
7.23 
2.50 
7916 
O 
328 
7917 
V 
Aug. 30, 1854 
87 
5.37 
7921 
. 
.do. 
5.50 
7.25 
4566 
6 
7920 
<? 
Winter. 
J. Xantus de Vcscy 
