304 BIRDS OF BRITISH GUIANA. 



size. The width o£ the bill at the base is about equal to the length 

 of the exposed culmen, and the nostrils are covered with feathers. 

 The wing is rounded, the second and third primaries longest, and 

 the first is about equal to the fourth. The tail is square at and 

 about half the length of the wing. The tarsus is about twice the 

 length of the exposed culmen. 



Key to the Species. 



A. Smaller, wing less than 65 mm.; throat and 



under tail-coverts cinnamon I. leucopygia, p. 304. 



B. Larger, wing more than 65 mm.; throat dark 



smoke-brown; under tail-coverts white . Z/wsca, p. 305. 



. 544. lodopleura leucopygia. 



White-rumped Chatterer. 



lodopleura pipra (nee Less.) Cab. in Schomb. Eeis. Guian. iii. p. 697, 



1848. 

 lodopleura leucopygia Salvin, Ibis, 1885, p. 305 (British Guiana) ; 



Selater, Cat. B. Brit. Mus. xiv. p. 393, pi. xxvi, 1888 ; Brabourne & 



Chubb, B. S. Amer. i. p. 323, no. 3305, 1912. 



Adult. General colour of the upper surface dusky brown, in- 

 cluding the top of the head, back, wings, and tail ; rump white; 

 inner webs of flight-quills margined with white ; ear-coverts, sides 

 of neck, and hind-neck inclining to dark slate-grey ; throat and 

 under tail-coverts cinnamon ; breast and sides of body white with 

 dark edges to the feathers ; abdomen white ; axillaries lilac ; under 

 wing-coverts and base of quills white ; marginal under wing- 

 coverts and apical portion of quills and lower aspect of tail dark 

 brown. 



Total length 93 mm., exposed culmen 6, wing 54, tail 27, 

 tarsus 15. 



This species is not represented in the McConnell collection, and 

 the description is taken from the type in the British Museum 

 — Salvin-Grodmari collection. 



Breeding-season. Unknown. 



Nest. Unrecorded. 



Eggs. Undescribed. 



Range confined to British Guiana. " British Guiana " ( Whitely). 



Habits.. Unrecorded. 



