612 fritoillidA 



distinctly ; the head also brown like the back, and spotted with 

 black, the centre of the crown rather paler ; a whitish eyebrow 

 above the ear-coverts ; lores and ear-coverts dusky blackish ; sides 

 of neck pale and more sandy than the back, and foreshadowing the 

 rufous neck of the adults ; cheeks and under surface of body ashy 

 white, spotted with small triangular markings of blackish, the chest 

 and sides of the body fulvescent ; abdomen purer white ; wings and 

 tail much as in the adult, but the coverts tipped with fulvous instead 

 of white. 



Some young birds, probably males, have the spots on the under 

 surface blacker and more linear, with a distinct shade of chestnut 

 on the sides of the breast and neck ; the centre of the crown dis- 

 tinctly ashy, as well as the streak above the ear-coverts ; the quills 

 distinctly edged with rufous. 



It is interesting to trace the variation in the colour of this species. 

 Beginning with Chilian and La-Plata examples, a gradual transition 

 is met with towards the Guatemalan specimens, which are much 

 darker slaty grey on the head, have a nearly perfect praepectoral 

 black collar, and are smaller in size. In northern specimens the 

 black patches on the side of the neck are connected by a few tiny 

 dots of black ; in Bolivian examples the connection is slightly more 

 marked, still more so in Guiana and Colombian ones, and reaching 

 its most complete development in those from Costa Rica and 

 Guatemala. 



Bab. The whole of Central America from Moxico to Panama, 

 and throughout South America to Southern Brazil, Bolivia, and 

 Chili. 



a. Var. sk. South America. Purchased. 



b. Ad. sk. South America. Sclater Coll. 



c. d. Ad. sk. Coquimbo, Chili, Nov. (A. Salvin-Godman Coll. 



H. Markham). 



e. <S ad. sk. Chili. Salvin-Godman Coll. 



/. <$ ad. st. Monte Video. Sir W. Burnett and 



Admiral Fitzroy [P.]. 



g. Ad. sk. Near Monte Video, May 1, H. Durnford, Esq. ["CI 



1875. L J 



h, i. S $ ad. sk. Buenos Ayres, Oct. 29, 1876. II. Dumford, Esq. [C]. 



k. $ ad. sk. Punta Lara, Buenos Ayres, H. Durnford, Esq. [CI. 



Dec. 19, 1875. 



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



m. c? ad. sk. Conchitas, Buenos Ayres, Salvin-Godman Coll. 



Nov. ( W. H. Hudson ; Sm. 



no. 49380). 



n, o. Ad. sk. Salta, Argentine Republic, H. Durnford, Esq. [P.]. 



June 22, 1878. 



p. Ad. sk. Brazil. Capt. Lord Byron [P.], 



q. Ad. sk. Brazil. J. Gould, Esq. 



r. Ad. st. Brazil. Lord Stuart de Rothe- 



say. 



s, t. ,5 2 ad. sk. Pelotas, Rio Grande do Sul Salvin-Godman Coll. 



(Juyner). 



u. Juv. sk. Nairapi, Bolivia (C. Buckley). Salvin-G odman Coll. 



