21b* 
U. S. P. R R. EXP. AND SURVEYS—ZOOLOGY-—GENERAL REPORT 
TURDUS SWAINSONII, Cab. 
e Olive-backed Thrush. 
Turdus swainsonii, Cab. in Tschudi F. Peruana, 1844-M6, 168.— Ib. in V. Homeyer’s Rhea, II, 149.— Ib. Mus. Hein. 
1850,5. (Siberia.) 
? Turdus brunneus, Boddaert, Tab. PI. enl. 1783, according to Gray in Genera. Based on PI. enl. 556, f. 2. 
Turdus minor, Gm. Syst. Nat. I, 1788, 809. (Combined with T. fuscescens.) — Vieillot, Ois. Am. Sept. II, 1807, 7 ; 
pi. lxiii. (Mixed with T. pallasii ) —Bon. List. 1838.— Ib. Conspectus 1850, 271. 
? ? Turdus fuscus, Gmelin, Syst. Nat. I, 1788, 817. (Mixed with T. mustelinus?) 
Turdus solitarius, Wilson, Am. Orn. V, pi. xliii, fig. 2, (figure only.)—Sw. F. Bor. Am. II, 1831, pi. xxxvi, (figure 
only.) 
Merula wilsonii, Sw. F. B. A. II, 1831, (not the figure.) 
Turdus olivaceus, Giraud, Birds Long Island, 1843-’44, 92, (not of Linn, or Bodd.)— Brewer, Pr. Bost. Soc. N. 
# H. July, 1844, 191. 
Little Thrush, Pennant, Arctic Zool. II, 1785, 338. 
Sp Ch. —Third quill longest ; second and fourth but little shorter, and much longer than the fifth ; (by .35 of an inch.) 
Upper parts uniform olivaceous, with a decided shade of green. The fore part of breast, the throat and chin, pale brownish 
yellow ; rest of lower parts white ; the sides washed with brownish olive. Sides of the tnro'at and fore part of the breast with 
sub-rounded spots of well defined brown, darker than the back ; the rest of the breast (except medially) with rather less distinct 
spots that are more olivaceous. Tibiae yellowish brown. Broad ring round the eye. Loral region, and a general tinge on the 
side of the head, clear reddish buff. Length, 7.00 ; wing, 4.15 ; tail, 3.10 ; tarsus, 1.10. 
Hab .—Eastern North America to the Black Hills ; south to Mexico and Peru ; north to Greenland. Accidental in Europe 
and Siberia. 
This species is at once distinguished from the others by the perfectly uniform and pure dull 
olivaceous shade of its upper parts, most strongly marked and appreciable on the rump and tail. 
The throat and breast are, perhaps, more reddish than in any of our species, and the tinge in 
the marking on the side of the head is very much more decided than in any other. The spots 
on the breast larger than in T. ustulatus, and. rather more numerous than in pallasii. 
List of specimens. 
Catal. 
No. 
Sex. 
Locality. 
When col¬ 
lected. 
Whence obtained. 
Orig. 
No. 
Collected by— 
Length. 
Stretch 
of wings. 
Wing. 
Remarks. 
981 
2906 
980 
2263 
2639 
388 
666 
6993 
6994 
7523 
8302 
4324 
5657 
4707 
4710 
8818 
8215 
7948 
9 
8 
8 
8 
8 
8 
8 
8 
8 
Carlisle, Penn. .... 
May 18, 1843 
May 3, 1815 
May 18, 1843 
May 16, 1845 
May 12, 1846 
May, 1841 
May 13, 1842 
May 15, 1857 
S. F. Baird. 
6.50 
7.63 
7. 
7.25 
6.83 
6.75 
6.50 
11.50 
12.08 
12.50 
12.50 
11.91 
12.16 
12. 
3.75 
4.C8 
4.16 
4.08 
3.91 
.do. 
Lt. F. T. Bryan.... 
w. S. Wood. 
Independence, Mo. 
May. 26,1857 
Wm. M. Magraw... 
15 
Dr. Cooper. 
7.00 
7.50 
11.25 
12.25 
3.75 
3.75 
Iris brown; bill 
black and yel¬ 
low; feel brown. 
1854. 
8 
8 
8 
8 
Rep. Fork, 40 miles west 
of Fori Riley. 
Opposite mouth Vermilion 
Lt. F. T. Bryan.... 
VV. S. Wood. 
7.00 
6.75 
7.25 
7.12 
7.37 
■> 
May 8,1856 
Lt. Warren. 
Dr. Hayden. 
11.37 
11.87 
11.12 
12.00 
4.12 
4.25 
4.12 
4.00 
Iris light brown. 
Fort Laramie, Nebraska.. 
Sept. 10,1857 
Dr. J. G. Cooper. .. 
197 
