390 
U. S. P. R. R. EXP. AND SURVEYS—ZOOLOGY—GENERAL REPORT. 
List of specimens. 
Catal. 
No. 
Sex. 
Locality. 
When col¬ 
lected. 
Whence obtained. 
Orig’l 
No. 
Collected by— Length. 
Stretch 
»f wings. 
Wing. 
Remarks. 
Racine, Wis. 
Dr. Hoy. 
7513 
<J 
43 
. 
8.00 
4732 
April 21, 1856 
Dr. Hayden_ 5.50 
7.50 
2.75 
6765 
.do. 
Nov. 27, 1854 
5574 
Fort Riley, K. T. 
5873 
.do. 
1856. 
- 
5872 
1856 . 
5644 
s 
29 
W. S. Wood..... 
4733 
3 
April 2, 1856 
Dr. Hayden.... 4.37 
8 00 
2.75 
6766 
R. H. Kern. 
6769 
8828 
Black Hills, Neb.... 
7.75 
2.75 
8827 
.do. 5.75 
8.37 
2.75 
8493 
Q 
PARUS ATRICAPILLUS, Linn. 
Black-cap Titmouse. 
Parus alricapillus, Linn. Syst. Nat I, 1766, .341.— Gm. I, 1788, 1008.— Forster, Philos. Trans. LXI1, 1772, 383.— 
Wilson, Am. Orn, I, 1808, 134 ; pi. viii,f. 4.— Bon. Obs. Wilson, J. A. N. S. IV, 1825, 254. 
(Differences from P. palustris .)— Audubon, Orn. Biog. IV, 1838 ; pi. 353, f. 3— Ib. Birds Ainer. 
II, 1841, 146 ; pi. 126.— Cassin, Ill. I, i, 1853, 17. 
Poecila atricapilla, Bon. Consp. 1850, 230 
Parus palustris, Nutt. Man. I, 1832, 79 
Sp. Ch.— Second quill as long as the secondaries. Tail very slightly rounded ; lateral feathers about . 10 shorter than middle. 
Back brownish ashy. Top of head and throat black, sides of head between them white. Beneath whitish ; brownish white 
on the sides. Outer tail feathers, some of primaries, and secondaries conspicuously margined with white. 
Length, 5 ; wing, 2.50 ; tail, 2.50. 
flab. —Eastern North America along the Atlantic border. 
In this species tlie first quill is spurious ; the fourth quill is longest; the fifth and sixth 
successively a little shorter ; the third is about equal to or a little shorter than the eighth ; the 
second is a very little longer than the secondaries. The tail is a little rounded, the innermost 
feather longest, the rest successively a little shorter. The greatest difference in length of tail 
feathers amounts to .10 of an inch. 
The entire crown, from the hill to the upper part of the hack, coming down on the sides to 
the lower level of the eye, is pure black, although the edge alone of the lower eyelid is of this 
color. A second black patch, begins at the lower mandible and occupies the entire under 
surface of the head and throat, hut not extending as far hack within a quarter of an inch as 
that on the upper part of the neck. The space between these two patches, on the sides of the 
head and neck, white, this color extending along the black of the hack of the neck as far as its 
truncated extremity, hut not bordering it behind. The middle of the breast and belly, as far 
as the vent, are dull white, that immediately behind the black of the throat a little clearer. 
The sides of the breast and body under the wings, with the under tail coverts, are pale, dull 
brownish white. The back, rump, and upper tail coverts are of a dirty bluish ash, washed with 
yellowish brown, especially on the rump. The wings are brown ; the outer edges of the third 
to the seventh primaries narrowly edged with whitish ; the innermost secondaries more broadly 
