( 338 ) 



sometimes with a narrow, rusty buif apical margin. Lores, cheeks, and ear-coverts 

 dull dark shite-grey. Lower parts clear ferruginous, throat palest, foreneck and 

 breast darkest, flanks tinged with brownish. 



Wing 77—80 ; tail 60—64 mm. 



Obs. Miss Snethlage (Lr. pp. 283-4) records both T. nigrocinei-eu.t and 

 T. cinereoniger from Maraju (S. Natal) and Monte Alegre, under the erroneous 

 supposition that the specimens without the white mark on the outer web of the 

 external rectrix represent the former " si)ecies." At my request, the learned lady 

 sent me some of these examples. I found that the presence or absence of the 

 white spot was a j)urely individual character, and that all skins from Lower 

 Amazonia (except those obtained on the Tapajoz) were unijuestionably referable to 

 nigrocinereus, having the head all round, foreneck and mantle black, etc. 



{b) T. nigrociiwreus Imberi Snethlage. 



Thiimnnphiliisluiberi Snethlage, Orn. Moiiber. xv. p. lOl (liiOT— Ilha de Ooyana, Rio Tapajdz) ; 



eadem, Jouru.f. Orn. Iil08. p. .109 (Goyana). 

 T. cinereoniger (nee Pelzeln) Pelzeln, Zirr Orn. Brat. ii. 18GH. p. Vij (part. : Tapajdz). 

 T, nigrocinereus (nee Sclater) Chapman & Riker, Anh- 1891. p. 28 (Santarem). 



Hab. Lower Amazonia, Rio Tapajoz : Santarem (Natterer, Smith), Ilha de 

 Goyana (Snethlagej. 



6 ad. Agrees with the preceding form in having the top and sides of the head 

 as well as the mantle black, the latter conspicuously contrasted with the slate-grey 

 of the rump, but the throat is slate-grey like the rest of the under surface, and the 

 under tail-coverts are broadly tipped with white. 



Type : wing 82 ; tail 67 mm. 



¥ ad. Differs from T. n. nigrocinereus by its darker, deep sooty black, slightly 

 glossy pileum, deeper grey sides of the head, and by having the edges to the upper 

 wing-coverts, remiges, and rectrices much darker rufous brown. 



Wing 78i— 80 ; tail 62— (i4 mm. 



Obs. The female type of T. Imberi is consideralily darker cinnamon-rufous 

 below than either T. ii. nigrocinereus or T. n. cinereoniger, but a second specimen 

 from the Tapajoz (coll. Natterer) does not differ in that respect from its allies. 

 Otherwise it is practically identical with the Goyana female. I am greatly indebted 

 to Miss Snethlage for the loan of the typical examples. 



{c) T. nigrocinereus cinereoniger Pelz. 



Thamnophilux cinereoniger Pelzeln, Zur Orn. Bras. ii. pp. 76, 143 (1868. — near Airao, Marabitanas, 

 Rio Vaupe, R. Amajai'i : Rio Negro); Berlepsch & Hartert, Nor. Zool. ix. 1902. p. 09 

 (Mumluapo, Maipures, Altagracia : Upper Orinoco, Venezuela). 



Flab. N.W. Brazil, Kio Negro district: Airao, Marabitanas, Rio Vaup^, 

 Rio Amajau (Natterer). Venezuela, Upper Orinoco : Munduapo, Maipures, 

 Altagracia (tJherrie). 



<S ad. DiflFers from the preceding races by having the cap decidedly dniler 

 blackish ; the mantle mainly sooty grey, clouded with dusky ; the sides of the head 

 dark grey (not blackish); the lower parts of a clearer slate-grey. Under tail-coverts 

 tipped with white as in 7\ u. kuberi. 



Wing 78—81 ; tail 60—04 mm. 



? ad. Agrees with T. n. nigrocinereus in the colour of the top and sides 



