214 TtlRDIDJE. 



Turdus rufiventris, Vieill., apud d'Orhiqn. Toy. Amer. merid. iv. pt. 3, 



p. 203 (circ. 1840). 

 TiU'dus amaui'oclialiuus, Cah. Mus. Hein. i. p. 5 (1850) ; Sclater, 



P. Z. S. 18r,9, p. 329 ; Scl. 8,- Salv. P. Z. S. 1866, p. 177 ; iid. P. Z. S. 



1867, pp. 508, 749. 

 Planesticiis amaurochalimis {Cab.), Pp. Cumpt. Rend, xxxviii. p. 3 



(1854). 

 Turdus albiventris, Spix, apud Sclatm-, P. Z. S. 1858, p. 451; apud 



Sclater, P. Z. S. 1859, p. 328 ; apud Sclater, Cat. Amer. B. p. 3 



(1862). 

 Turdus crotopezus, Licht., apiud Burm. Reise La Plata-St. ii. p. 474 



(1861). _ 

 Turdus poiteauii, Less.,Jide Pelz. Orn. Bras. p. 94 (1871). 



In the adult male the general colour of the upper parts is brown, 

 ■with a very slight tinge of olive or slate, somewhat darker on the 

 head ; lores nearly black ; ear-coverts dark brown ; no trace of eye- 

 stripe. Chin, cheeks, and upper throat huffish white, each feather 

 having a long fan-shaped dark-brown terminal spot ; lores, throat, 

 and flanks pale huffish brown, shading into nearly white on the centre 

 of the belly and under tail-coverts : axillaries and under wing-coverts 

 pale huffish brown, obscurely margined with bufi'; inner margin of 

 quills pale huffish brown. Bill yellow above and below. ^\^ings 

 with the fourth and fifth primaries nearly equal and longest, second 

 primary between the sixth and seventh, bastard primary 0"95 to 

 0"9 inch. Legs, feet, and claws dark brown. Length of wing 4'7 

 to 4-25 inches, tail 4-2 to 3'8o, culmen 0-93 to 0'87, tarsus 1*25 

 to 1-15. 



There is no difference in the colour of the sexes. Birds of tlie 

 year and young in first plumage have the usual characteristics of 

 immature birds of this genus. 



The tyjiical form of the Common South-American Thrush has a 

 very wide range, having been found in Guiana, Brazil from Bahiato 

 Santa Catherina, and southwards to Bio Negro and Chili, in all 

 which provinces it is supposed to be a resident. Litermediate forms 

 appear on the Pacific slope of the Andes of Ecuador, and in the valley 

 of the Upper Amazons in N'orthern Peru, whilst in Colombia the 

 extreme form occurs. 



a. 2 ad. sk. Lower Ucayali. E. Bartlett, Esq. [C.]. 

 h. 5 ad. sk. Xeberos, Peruvian Amazons, E. Bartlett, Esq. [C.]. 



June 14, 1866. 



e. Ad. sk. Pajsandu, Buenos Ayres Alan Peel, Esq. [C.]. 



Aug. 1877. 



d. Ad. St. Rio Negro (C. Darwin). Zoological Society. 



e. Ad. St. Brazil. John Goiild, Esq! [P.]. 

 yj ff- d fid. sk. Chili. Zoological Society. 



The synonymy of the Colombian form is as follows : — 



26. Turdus ignobilis. 



Tardus ignobilis, Sclatei; P. Z. S. 1857, p. 273: id. P. Z. S. 1859, 

 p. 328; id. Cat. Ainer. B. p. 3 (1862). 



