612 



MOTACILLID.E. 



which differ from the adults only in having much paler edgings to 

 the feathers of the upper surface, and in having the quills and tail- 

 feathers broadly edged with whitish ; the lores, eyelid, and eyebrow 

 are dull whitish ; the ear-coverts also dull white, slightly spotted 

 with black, and washed with sandy buff on the upper parts ; cheeks 

 dull white, with a well-defined malar streak of black ; throat and 

 under surface of body dull white, washed with sandy buff on the 

 fore neck, breast, and flanks, which are narrowly streaked with 

 black. 



The long wedge-shaped mark of white on the second tail-feather, 

 reaching from the tip nearly to the base, is the best distinguishing 

 character of this species : but it is apparently very gradually assumed, 

 and is not therefore always well marked. In the Salvin-and- 

 Godman collection is a specimen from Coquimbo (Capt. Markham) 

 which has the penultimate tail-feather entirely dark brown, with 

 only a tiny white spot at the tip, and not a sign of the wedge- 

 shaped white mark beyond a certain pallor of the region of the shaft. 

 Many specimens have only a broad wedge-shaped spot on the inner 

 web, and its extent down the whole feather seems to be so gradual 

 that often the two sides of the tail are asymmetrical in their mark- 

 ings, one side having the white on the penultimate feather far more 

 extended than the other. 



The young birds have more white on the outer tail-feather than 

 the oldones, the outermost feather being whitish with a blackish 

 mark along the inner edge of the inner web, without any brown 

 along the outer web ; the penultimate feather, however, has the 

 outer web brownish. 



Hah. Falkland Islands ; Chili and Patagonia, ranging as high as 

 Southern Brazil, Bolivia, and Peru. 



a, h. Ad. sk. East Falkland. 



c, d. Ad. sk. East Falkland. 



e. Ad. sk. Chili. 



f,[l- (5 2 ad. ; h, Santiago, Chili {Landbeck). 



i. S 2juv.sk. 



k. Ad. sk. [ChiU.] 



I. Ad. sk. 

 m. Ad. sk. 

 w. $ ad. sk. 



o. Ad. sk. 

 p. (S ad. sk. 



q. Ad. sk. 

 r. 2 3.d. sk. 



s, t. Ad. sk. 

 u. Ad. sk. 



V. Skeleton. 



ChiH. 



Valparaiso. 



Coquimbo, Chili {A. H. 



Markham) . 

 Mendoza. 

 Eio Negro, Patagonia, 



June 1871. 

 Maldonado {€'. Darwin). 

 Conchitas, Buenos Aires, 



April (TT. H. Hudson). 

 Buenos Au-es {Haslehmst). 

 Buenos Aires. 



Lieut. A. Smith [P.]. 

 Antarctic Expedition. 

 Zoological Society. 

 Sclater CoUection. 



Sir E. Burnett and 



Admiral Fitzroy [P.]. 

 Sclater Collection. 

 Charles Darwin, Esq. [P.]. 

 Salvin-Godman CoU. 



Herr Weisshaupt [C.]. 

 W. H. Hudson, Esq. [C.]. 



Voy. H.M.S. 'Beagle.' 

 Sclater Collection. 



Salvin-Godman Coll. 

 Henrv Dm-nford, Esq. 



Purchased. 



