THRYOPHILUS. 355 



The bill is comparatively long and pointed, the width at the 

 posterior part of the nostrils about equal to its depth, and the 

 nostrils oval in shape. The wing is rounded, the fourth, fifth, 

 and sixth primaries longest, and the third about equal to the 

 seventh. The tail is rounded and graduated, the outer feather on 

 each side about seven-tenths the length of the middle ones. The 

 tarsus is about one-third longer than the exposed culmen. 

 Coloration : male and female similar. 



567. Thryophilus albipectus. 



ScHOMBDRGK's WHITE-rACED Ween. 



Thryotliorus albipectus Cab. in Schomb. Eels. Guian. iii. p. 673, 1848 



(British Guiana). 

 Thryophilus leucotis (nee Lafr.) Sharps, Cat. B. Brit. Mus. x. p. 207, 



1881. 

 Thryophilus albipectus Brabourne & Chubb, B. S. Amer. i. p. 332, 



no. 3390, 1912. 



Adult male. Crown of the head, sides of the neck, lesser upper 

 wing-coverts, and entire back rufous-brown ; greater upper wing- 

 coverts, bastard-wing, primary-coverts, and flight-quills blackish 

 barred with rufous, the inner edges of the last paler ; tail also 

 black barred -with rufous, rather brighter and more broadly than 

 on the wing-quills ; lores, a ring of short feathers round the eye, 

 and a line behind the latter white ; cheeks and ear-coverts also 

 white, more or less marked with blackish ; throat white ; breast and 

 abdomen isabelline-buff, becoming darker and inclining to rufous 

 on the flanks and under tail-coverts ; under wing-coverts white 

 tinged with buff ; under surface of flight-quills dark brown with 

 buff edgings; lower aspect of tail similar to its upper surface. 



Total length 131 mm., exposed culmen 16, wing 64, tail 5], 

 tarsus 23. 



The specimen described was collected at Bartica in 1911. 



Adult female. Similar to the adult male but rather smaller. 

 Wing 59 mm. 



Breeding-season. Unrecorded in British (ruiana. 



JYest. It nests in low bush or small trees in the Savannas 

 [Schomhurgk). , 



Eggs. Undescribed from British Guiana. 



Range in British Guiana. Upper Takutu Mountains, Ituribisi 

 River, Supenaam River, Bartica, Bonasika River, Abary River 

 (McConnell collection). 



2a2 



