HYLOCICHfA. 



389 



quills hair-brown with white on the basal portion ; sides of face 

 streaked with dark brown and buffy-white ; a streak of dark brown 

 ^on each side of the throat ; middle of throat, abdomen, and under 

 tail-coverts white, the last more or less marked with isabelline ; 

 fore-neck and breast cream-colour, with dark brown pear-shaped 

 markings at the tips of the feathers ; sides of the body, axillaries, 

 under win.g-coverts drab-brown j under surface of flight-qnills 

 and lower aspect of- tail hair-brown. 



Total length 173 mm., exposed culmen 13, wing 105, tail 67, 

 tarsus 30. 



Adult female. Similar to tlie adult male. Wing 100 mm. 



This species is not represented in the McConnell collection and 

 the specimens described are in the British Museum ; both male 

 and female were collected by Whitely on the Kamarang River 

 in December 1885 — Salvin-G-odman collection. 



This species also bi-eeds in North America, and occurs in British 

 Gruiana as a winter visitor only. Whitely procured specimens 

 during the months of December, February, and March. 



Range in British Guiana. Kamarang River, Kamakusa, 

 Bartica ( Whitely). 



Extralimital Range. Venezuela, Colombia, and Peru in South 

 America and north through Central America to th-e United States, 

 Canada, and Arctic America. 



Ilahits. Unrecorded in British Guiana. 



591. Hylocichla ustulata. 

 ' Russet-backed Thkush. 



Tttrdus ustulafus Nuttall, Man. Om. i. p. 400, 1840 (Columbia, Wash- 

 ington); Seebohm, Cat. B. Brit. Mus. v. p. 203, 1881; Salvin, 

 Ibis, 1885, p. 197 (Eoraima).- 



Hylocichla ustulata Brabourne & Chubb, B. S. Amer. i. p. 347, 

 no. 8552, 1912. 



Adult. General colour above olive-brown, including the crown 

 of the head, entire back, wings, and tailj inner webs of the flight- 

 quills dark brown with white bases ; sides of face like the back 

 with pale shaft-lines to some of the feathers ; a black moustachial 

 streak along the cheeks ; throat and fore-neck buffy-white with 

 dark pear-shaped marks to the feathers on the latter ; breast, 

 abdomen, and under tail-coverts white with pale brown spots to 

 the feathers on the breast and some of the under tail-coverts, 



