390 U. S. P. R. R. EXP. AND SURVEYS — ZOOLOGY — GENERAL REPORT. 
List of specimens. 
Canl 
No. 
Sex. 
Locality. 
When col- 
V\ hence obtained. 
No. 
Collected by — 
Length 
Stntch 
Wing. 
Remarks. 
N. VV. University.. 
7513 
s 
June, 1857. . . 
43 
5.50 
8.00 
4732 
April 21, 1856 
Nov. 27, 1854 
Dr. Hayden .... 
5.50 
7.50 
2.75 
6765 
5873 
Hammond & Tesey. 
587-2 
5644 
s 
June 18, 1856 
Lieut. F. T. Bryan. 
29 
4733 
s 
Mouth ot Big Nemaha 
April 2, 1856 
Dr. Hayden.... 
4.37 
8.00 2.75 
67C6 
67G9 
Black II, lis, Neb 
Sept. 15, 1857 
Dr. Hayden 
5.50 
5.75 
7.75 
8.37 
2.75 
2.75 
8827 
8493 
9 
Fort Massachusetts, N. M. 
Uapt. Stansbury.. .. 
PARUS ATPJCAPILLUS, Linn. 
Black-cap Titmouse. 
Pants atricupillus, Linn. Syst. Nat. I, 1766, 341.— Gm. I, 1788, 1008.— Forster, Philos. Trans. LXII, 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. 8 — Ib. Birds Amer. 
II, 1841, 146 ; pi. 126.— Cassin, 111. I, i, 1853, 17. 
Poeciia atricapilla, Bon. Consp. 1850, 230 
Parus palustris, Nutt. Man. I, 1832, 79j 
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. 
Hob. — Eastern North America along the Atlantic border. 
In this species the 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 bill to the upper part of the back, 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, but not extending as far back 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 back of the neck as far as its 
truncated extremity, but 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 
