50. D0NAC0BIU8. 365 



secondaries dark brown ; tail-feathers black, narrowly fringed with 

 Avhite at the tip of the centre ones, the remainder with a broad 

 white end, increasing in extent towards the outer ones ; head and 

 nape black, the blackish shade extending also slightly onto the 

 hind neck ; lores, sides ot" face, and ear-coverts black, as well as the 

 feathers at base of lower mandible ; cheeks and under surface of 

 body ochreous buff, the sides of the breast and flanks varied with 

 cross lines of dusky brown ; thighs reddish brown behind ; under tail- 

 coverts deeper ochreous buff ; under wing-coverts and axillaries 

 chocolate-brown, the latter slightly varied with blackish cross lines ; 

 quills blackish brown below, with a large patch of white at the base 

 of the primaries ; " bill black ; legs blackish brown ; iris bright 

 yellow " ( Wied). Total length 8-2 inches, culmen 1, wing 3-2, 

 tail 3-7, tarsus 1-2. 



Yuunr/. Differs from the adult in having the head browner, and 

 the ear-coverts slightly streaked with fulvescent shaft-lines ; the 

 wing-coverts tipped with rufous ; wing-spot much smaller ; throat 

 and cheeks whitish ; fiauks without any cross lines. Total length 

 7'5 inches, culmen 0'9, wing 2'9, tail 3-7, tarsus 1"15. 



The Black-headed Mocking-Thrush inhabits South America. 



Prince Lichtenstein [P.]. 



M. Claussen [P.]. 



J. liauxwell, Esq. [C.]. 



Purchased. 



2. Donacobius albovittatus. 



Donacobius albovittatus, Lafr. et D'Orb. May. de Zuol. 1837, p. 19; 



D'Oib. T'oi/. Amer. merid. p. :>13, pi. 12. lig. 1 ; Baird, Eevieio 



Aiiier. B. p. -jS, note (1861) ; 8cl. i^- 8alv. Nomencl. Av. Neotr. 



p. o (1873) ; iid. P. Z. 8. 187!J, p. 592. 

 Donacobius albolineatus, Gray, Gen. B. i. p. 223 (184G) ; Bj). Coiixp. 



i. p. 277 (1850) ; id. C. R. xxxviii. p. 58 (1854) ; Gray, Hand-l B. 



i. p. 192, no. 2030 (1869). 



Adult. General colour above chocolate-brown, including the 

 wing-coverts and scapulars ; primaries blackish brown, with a large 

 patch of white at their* base, forming a conspicuous wing-spot, the 

 secondaries chocolate-brown ; lower back, rump, and upper tail- 

 covcrts reddish brown, especially the latter ; centre tail-feathers 

 dark chocolate-brown, the remainder black, tipped with white, 

 which increases in extent towards the outermost, which are wliite 

 with black ba.ses ; head and nape black, as well as the sides of the 

 face and car-coverts and sides of the neck ; a white stripe running 

 from the hinder part of the eye, above the ear-coverts to the side of 

 the nape ; cheeks and under surface of the body rich ochreous 

 yellow, deeper on the flanks and under tail-coverts, as well as on 

 the breast, the sides of the latter and the upper fiauks barred with 

 narrow dusky cross lines ; axillaries brown, narrowly barred with 

 blackish cross lines ; yuder wing-coverts dark brown, the edge of 



