242 
U. S. P. E. 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 personalis of Swainson 
as distinguished from his T. brachydactylus. 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 Racine has the 
belly yellower than usual, and thus more like G. velalus. 
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 
Wing. 
Remarks. 
2178 
2293 
2572 
2656 
2535 
2215 
385 
2303 
1105 
703 
8655 
7370 
7922 
5825 
10152 
8313 
4074 
4675 
3 
3 
3 
3 
3 
3 
9 
9 
9 
3 
April 30, 1845 
May 20, 1845 
May 4, 1846 
May 12, 1846 
April 30, 1846 
4.75 
5.C8 
5.16 
5.08 
5.50 
5.08 
6.91 
6 66 
7.08 
7.08 
7.43 
7.25 
6.91 
6.91 
6.50 
2.25 
2.25 
2.17 
2.17 
2.43 
April 3,1846 
April 15, 1846 
May 21, 1845 
July 5, 1843 
April 25, 1842 
5.08 
4.75 
2.16 
2.00 
Washington, D.C 
5.25 
7.00 
2.25 
Dr. J. P. Rutland 
3 
3 
3 
3 
West Northfield, III 
May 15, 1857 
May 27, 1857 
Win. M.Magraw... 
30 
Dr. Cooper .... 
5.00 
4.50 
4.50 
5.37 
4.75 
5.25 
5.00 
4.75 
6.37 
6.50 
7.00 
7.00 
7.12 
7.00 
7.00 
6.75 
2.12 
2.00 
2.00 
2.50 
Iris brown ; bill black; 
feet flesh color. 
3 
May 15 ... , 
Dr. Hayden.... 
8836 
8834 
8837 
5304 
8227 
7915 
7916 
7917 
7921 
4566 
7920 
3 
3 
3 
3 
2.25 
2.25 
2.25 
o 
3 
9 
Fort Laramie, Neb 
Sept. 17, 1855 
April 25, 1856 
April 26, 1856 
Wm. M. Magr'aw... 
209 
327 
328 
Dr. Cooper ... 
4.75 
6.75 
7.25 
2.50 
Iris brown ; feet pale 
brown. 
.10 
Aug. 30, 1854 
Dr. Cooper 
5.37 
5.50 
6.75 
7.25 
6 
3 
Dr. Heermann . 
Fort Tejon, Cal 
