BIEDS SYLVICOLIDAE — DENDROICA PENNSYLVANIA. 
279 
DENDROICA PENNSYLVANIA, Baird. 
Chestnut-sided warbler. 
Motacilla jiennsylvanica, Linnaeus, Syst. Nat. I, 1766, 333, No. 19.— Gmelin, Syst. Nat. I, 1788, 971, No. 19. 
Sylvia pennsylvanica, Latham, Ind. Orn. II, 1790, 540. — Wilson, Am. Orn . I, 1808, 99 ; pi. xiv, f. 5. 
Motacilla icterocephala, Linnaeus, Syst. Nat. I, 1766, 334, 25.— Gmelin, Syst. I, 1788, 980. 
Sylvia icterocephala, Latham, Ind. Orn. II, 1790, 538. — Vieillot, Ois. Am. Sept. II, 1807,31; pi. xo — Bon. 
Obs. Wils. 1826, No. 140.— Aud. Orn. Biog. I, 1832, 306 ; pi. 59.— Nuttall, Man. I, 1832, 
380. 
Sylvicola icterocephala, "Swainson," Jard. ed. Wilson, 1832. — Rich. List. 1837.— Bonap. List. 1838. — In. 
Conspectus, 1850, 308.— Aud. Syn. 1839, 54.— Ib. Birds Am. II, 1841, 35; pi. 81. 
Sp. Ch. — Male. — Upper parts streaked with black and pale bluish gray, which becomes nearly white on the fore part of the 
back ; the middle of the back glossed with greenish yellow. The crown is continuous yellow, bordered by a frontal and super- 
ciliary band, and behind by a square spot of white. Loral region black, sending off a line over the eye, and another below it. 
Ear coverts and lower eyelid and entire under parts pure white, a purplish chestnut stripe starting on each side in a line with 
the black moustache and extending back to the thighs. Wing and tail feathers dark brown, edged with ^luish gray, except 
the secondaries and tertials, which are bordered with light yellowish green. The shoulders witli two greenish white bands. 
Three outer tail feathers with white patches near the end of the inner webs. 
Female like the male, except that the upper parts are yellowish green, streaked with black ; the black moustache scarcely 
appreciable. 
Length, 5 ; wing, 2.50 ; tail, 2.20. 
Hub. — Eastern United States to the Missouri. 
The greenish white of the wing is rather in one band in the male than in two, the greater 
coverts being edged as well as tipped with this color. 
The male (possibly of the first year) in autumn is very different from either male or female 
in spring. The entire upper parts are of a continuous light olive green ; the under parts 
white ; the sides of the head, neck, and breast ash gray, shading insensibly into and tinging 
the white of the chin and throat. No black streaks are visible above nor on the cheeks, and 
the eye is surrounded by a continuous ring of white, not seen in spring. The wings and tail 
are much as in the female. 
In one specimen from St. Louis (6977) the black completely encircles the eye, and the bill is 
entirely bluish black, instead of being brown beneath. 
List of specimens. 
Catal. 
No. 
Sex. 
Locality. 
When collected. 
Whence obtained. 
Orig. 
No. 
Collected by — 
Length. 
Stretch 
of wings. 
Wing. 
1694 
2570 
2C64 
943 
976 
7361 
6976 
6978 
6977 
4670 
$ 
3 
3 
3 
9 
3 
Sept. 4, 1844 
May 4, 1844 
May 18, 1844 
May 6, 1844 
May 16, 1844 
May 15, 1855 
May 12 
S. F. Baird 
5. 25 
5. 16 
5.08 
5. 00 
5. 00 
7.41 
8. 00 
7.83 
7.75 
7. 50 
2.75 
2. 08 
2. 08 
2.50 
2.50 
do 
do 
do 
do 
do 
do 
Cleveland, Ohio 
West Northficld, 111.. 
South Illinois 
J. P. Kirtland 
do 
St. Louis, Mo 
May 12, 1857 
May — , 1857 
May 12, 1857 
April 26 
Lieut. Bryan 
do 
64 
W. S. Wood 
$ 
Lieut. Warren... 
58 
Mouth of Platte river. 
Dr. Hayden 
5. 00 
2.50 
