262 
U. S. P. R R. EXP. AND SURVEYS— ZOOLOGY-GENERAL REPORT 
(2159.) It is especially noticable in Ho. 8020, from Guatemala. This is also of an unusually 
dark olive above. 
The female differs only in being a little smaller, and perhaps in having the spots beneath 
more restricted. Autumnal and winter specimens are decidedly more sulphury yellow beneath, 
and the spots less sharply defined. There is little variation in the size of bill and feet in individuals 
ofthe sam e sex. ’ 
It is somewhat a question whether the Seiurus sulfurascens of authors be not merely the winter 
plumage, as observed in South America. This conclusion can only be avoided by showing that 
the sulphur-bellied bird breeds in South America in this plumage. 
List of specimens. 
Catal. 
No. 
Sex and 
age. 
Locality. 
When , Whence obtained, 
collected. 
Collected by— 
Length. 
Stretch 
of wings. 
Wing. 
Remarks, 
2668 
2531 
1501 
1502 
2431 
2159 
3317 
4304 
8669 
8668 
8667 
7358 
10169 
4721 
4818 
8020 
7639 ? 
May 14, 1846 
Apl. 30, 1846 
May 10, 1844 
May 10. 1844 
Sept. 8, 1845 
Apl. 28, 1845 
1846. 
S. F. Bail'd. 
5.25 
6.25 
6.25 
6.16 
5.91 
5.50 
6.00 
9.33 
9.66 
9.83 
9.75 
9.41 
8.75 
9.50 
3.00 
3.50 
3.16 
3.08 
3.00 
2.75 
3.00 
3 
3 
3 
9 
9 
O 
...do. 
Ib54. 
G. Wurdemann... 
9 
Sept. 24,1857 
Sept. 25,1857 
Sept. 26,1857 
6.00 
6.00 
5.25 
10.00 
9.00 
9.50 
3.00 
3.00 
3.00 
.. do... 
Light brown legs, black eyes. 
Charles Fox. 
R. Kennicott. 
3 
3 
Lieut. Warren.,.. 
6.12 
10.50 
3.12 
J. Gould. 
S. F. Bail'd. 
SEIURUS LUDOVICIANUS, Bo nap. 
Large-billed Water Thrush. 
?? Turdus motacilla, Vieillot, Ois. Am. Sept. II, 1807, 9 ; pi. lxv. 
Turdus ludovicianus, Aud. Orn. Biog. I, 1832, 99 ; pi. 19. 
Seiurus ludovicianus, Bonap. List, 1838. 
Seiurus motacilla, r BoNAr. Consp. 1850, 306. (Not of Vieillot.) 
Henicocichla major, Cabanis, Mus. Hein. 1850, 16. (Xalapa.) 
g p c n _J 5 j]i longer than the skull. Upper parts olive brown with a shade of greenish. A conspicuous white superciliary line 
from the hill to the nape, involving the upper lid, with a brown one from the bill through the eye, widening behind. Under 
parts white, with a very faint shade of pale buff behind, especially on the tail coverts. A dusky maxillary line ; the fore part 
of breast and sides of body, with arrow shaped streaks of the same color. Chin, throat, belly, and under tail coverts entirely 
immaculate. Length, 6.33;-, wing, 3.25 ; tail, 2.40 ; bill from rictus, .75. 
Hub .—Eastern United States to the Missouri. South to Mexico. 
This species may be readily distinguished from the S. noveboracensis by its larger size, 
especially of bill and tarsi, which are very conspicuously larger, the former especially. The 
color above is of perhaps a lighter olivaceous. The stripe over the eye, besides being more 
conspicuous, is, with the under parts, of a decided white, instead of brownish yellow; the spots 
beneath are paler and much fewer in number ; the chin and throat, the middle of the posterior 
portion of the breast, the sides of the body behind, and the under tail coverts, being entirely 
