2. (oi.r.Min. 248 



}>' . Genera] plumage not white-grey. 



a". Wing-coverts with some dark bands or patches. 



a'". Two black hands across tin- wings ( Cohcmba). 



a 4 . A white band across the middle of the tail. 



« 5 . Underparts white leuconota, p. 241). 



b 5 . Underparts grey rupestris, p. 250. 



b*. No white baud across the tail, which is dark 

 grey with a subapical black band ; upper tail- 

 coverts dark slate-grey like the tail. 

 c\ Hump white. 



a 8 . General plumage grey livia, p. 252. 



¥'. General plumage slate-grey, almost slate- 

 black gymnocyclut, 



d s . Rump not pure white. [p. 257. 



c K . Rump very pale grey, like the general 



plumage schimperi, p. 258. 



eP. Rump grey like the back ; general plu- 

 mage bluish grey intermedia, 



b'". Some dark patches or spots on the innermost [p. 259. 



upper wing-coverts. 

 e 4 . Feathers of the neck normal ; no white nuchal 

 band (Palumbcenas). 

 e s . Head with no vinaceous tinge on the upper 



part oenas, p. 261. 



f 5 . Head vinaceous on the upper part eversmanni, 



d 4 . Feathers of the neck lanceolate ; a white [p. 264. 



band below the occiput ( Tcenicenas) albitorques, 



b". Wings with no dark patches or bands. [p. 265. 



c". Feathers of the neck deeply bifurcated (Dia- 

 liptila). 



e x . Rump pale grey guinea, p. 266. 



/'. Bump dark grey phesonota, p. 268. 



a"". Feathers of the neck not bifurcated. 

 g 4 . Mantle, scapulars, and wing-coverts deci- 

 dedly earthy brown (Pieasurus). 



Buttik. Not Leyd. Mm. vii. p. 226. pi. (1885). x. p. 97 (1888), xi. 

 p. 13.") (1889) ; '/,/. IMschild. aim Liber, pp. 42:5, 476 (1889). 

 Leocotsnia unicincta, Rchmb. Ta/uben, ii. p. 167 (1862). 



Adult male. " Head above and neck light cinereous ; hack and upper wing- 

 coverts dark lead-colour, every feather edged with light bluish cinereous, 

 giving a squamose or scale-like character to those p:irts; rump and upper tail- 

 coverts dark lead-colour, more obscurely edged with bluish ashy. Underparts 

 pale vinaceous, nearly white on the throat and pale ashy on the sides and 

 flanks : middle of the abdomen, tibia:, and under tail-coverts white. Quills 

 ashy black, narrowly edged externally with while ; tail dark lead-colour, nearly 

 black, with one wide transverse band of white across the middle of all the 

 feathers. Under wing-coverts dark cinereous" (Cassin). "Iris red. and also 

 the naked space round the eye; bill blackish, point pale horn-coiour ; feet 

 grey" {Butttkofer). Total length about 13 inches, wing 8. tail 5. 



Female. Similar to the male. 



Ihili. Western Africa — Gaboon and Liberia. 



Only two specimens are known of this rare species— a male, the type, in the 

 Philadelphia Museum, from the River Ogobai, collected by Duchaillu: and a 

 female, in the Leyden Museum, from Liberia, collected bj Biittikofer at Sofore 

 Place. 



B2 



