262 



U. S. P, R R. EXP. AIJD SURVEYiS — ZOOLOGY — GENERAL REPORT. 



(2159.) It is especially noticable in No. 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 

 of the same 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 

 collected. 



Whence ohtained. 



Collected by- 



Length. 



Stietch 

 ofwings, 



Wing. 



2531 

 1501 

 1502 

 2434 

 3159 

 3317 

 4304 



8667 

 7358 

 10169 

 4721 

 4818 

 8020 

 7639; 



S 

 S 

 3 

 9 

 9 



o 



Carlisle, Fa 



do , 



do 



do , 



do 



do 



Liberty county, Ga 



Calcasieu Pass, La 



Cape Florida, Fla 



do 



do 



Lansing, Mich 



West Northfleld, III 



Vermilion river 



Mouth of Vermilion river. 



Guatemala. 



Brazil 



May 14, 1846 

 Apl. 3D, 1846 

 May 10, 1844 

 May 10, 1844 

 Sept. 8, 1845 

 Apl. 28, 1845 



1846 



1654 



Sept. 24, 1857 

 Sept. 25, 1857 

 Sept. 26, 1857 



5. F. Baird 



do 



, do 



, do 



, do 



do 



do 



6. Wurdemann., 



do 



do 



do 



Charles Fox 



R. Eennicott.... 

 Lieut. Warren . , . 

 do 



J. Gould... 

 S. F. Baird. 



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 



6.00 

 6.00 

 5.25 



10.00 

 9.00 

 9.50 



3.00 

 3.00 

 3.00 



Black bill 



Brovfn bill, light feet 



Light brown legs, black eyes. 



Dr. Hayden. 

 do 



Eye bluish black. 



SEIURUS LUDOVICIANUS, Bonap. 



Large-billed Water Thrush. 



.'.' Turdus motacilla, Vieillot, Ois. Am. Sept. II, 1807, 9 ; pi. Ixv. 

 Twrdm ludovidanus, AnD. Cm. Eiog. I, 1832, 99 ; pi. 19. 

 Seiurus ludovicianus, Bonap. List, 1838. 

 Seiunis motacilla, Bonap. Consp. 1850, 306. (Not of Vieillot.) 

 Henieocichla major, Cabanis, Mus. Hein. 1850, 16. (Xalapa.) 



gp Cjj^ 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 

 Darts 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. 



flail.— 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 



