262 U. S&S P. R R. EXP. AND SURVEYS— ZOCLOGY—GENERAL REPORT. 
(2159.) It is especially noticable in No. 8020, from Guatemala. This is also of an unusually 
dark olive above. a 
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 
of the sam e sex. 
Ii is somewhat a question whether the Seiwrus 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. 
7 ] 
Catal. Sex and Locality. When Whence obtained. | Collected by—| Length. | Stretch | Wing. Remarks. 
No. age. | collected. | of wings. 
May 14, 1846 | 8S. F. Baird 3 9.33 
eeeceecereeeeecccces | Apl. 30, 1846 9.66 
May 10, 1844 | 9.83 
*+| May 10, 1844 9.75 
-.| Sept. 8, 1845 9.41 
| ++} Apl. 28, 1845 8.75 
3317 fe} Liberty county, Ga........- ae Sagdodsedc Jeensie g 9.50 
A304 |... eens Caleasien Pass, La...ceccs:| LE54.ccccceee| Gs WUFHEMANN...|...c.ccccncces|eccscccelsece ous 
Cape Florida, Fla.....+ +... Sept. 24, 1857 | 10.00 | 3.00 | Black Dill.........e05 GduonG 
saceees Sept. 25, 1857 | 9.00 | 3.00 | Brown bill, light feet....... 
6 -| Sept. 26, 1857 Light brown legs, black eyes. 
..| Lansing, Mich...........05 |eeeeeereneeeee Charles Fox...... aise 
10169 | West Northfield, Ill........ Weectaaceececes | R. Kennicott..... 
4721 Vermilion river......6+ miaisis|| sieteis(sielsiels(als(elela Lieut. Warren.,.. 
4818 Mouth of Vermilion river...|.... seeer sees [eweees AO ieiswesies(e 
O20 remrareerste | Guatemala, seeeesceeeeecees|seeeee eee cers J. Gould..cceeees 
1639 2|.cccvee | Brazil..ccccee soccseccceces Joodadp doe boda 8. F. Baird....... 
SEIURUS LUDOVICIANUS, Bonap. 
Large-billed Water Thrush. 
?? Turdus motacilla, Visitor, Ois. Am. Sept. I, 1807, 9; pl. lxv. 
Turdus ludovicianus, Aup. Orn. Biog. I, 1&32, 99; pl. 19. 
Sciurus ludovicianus, Bonar. List, 1838. 
Sciurus motacilla, Bonar. Consp. 1850, 306. (Not of Vieillot.) 
Henicocichla major, Capanis, Mus. Hein. 1850, 16. (Xalapa.) 
Sp. Cu.—Bill longer than the skull. Upper parts olive brown with a shade of greenish. A conspicuous white superciliary line 
from the bill 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, 2.405 bill from rictus, .75. 
Hab.—FEastern 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 
