( 63 ) 



? ad. Two females from Chyavetas (British Museum) are not different from 

 those of true D. s. sckistaceus. 



I refrain, for the present, from naming this apparently nndescribed form, as 

 the three S 6 examined by me are very old skins of rather poor quality. 



c. Dysithamnus sckistaceus capitalis (Scl.) 



Thamnophiltis capitalis Sclater, P. Z. S. London 1858, p. 65 (Rio Napo, East Ecuador) ; Cat. Birds 



Brit. Mus. xv. p. 106 (Ecuador and Iquitos, Peru). 

 Dysithamnus sckistaceus (uec D'Orbigny) Sclater, Cat. Birds Brit. Mm. xv. p. 224 (part., spec, e, f,g, 



h, j, fc, : Iquitos, Pebas, Sarairia) ; Goodfellow, Ibh, 1902. p. 64 (Archidona, East Ecuador). 



llab. East Ecuador : Rio Napo (type), Zamora (Festa), Sarayacu (Buckley), 

 Archidona (Goodfellow). N.E. Peru (north of the Amazons) : Iquitos (Whitely), 

 Samiria, Pehas (Hauxwell). 



S ad. Of the same dark slate-grey colour as b., but readily distinguishable by 

 having the top of the head black.— Wing 64—68 ; tail 50—54 ; bill 19 mm. 



? ad. Not distinguishable from that of D. s. sckistaceus. Wing 04—66; tail 

 51—56; bill 18—19 mm. 



Material: 1 6 jr., Rio Napo. (Type of T. capitalis, Mus. Brit.); 2 <?<? ad., 

 Sarayacu, 1 8 ad., Archidona (Goodfellow)— Mus. H. v. Berlepsch and Tring ; 

 5 S cJ, Iquitos— Mus. Berlepsch and Brit. ; 1 c? ad. Pebas— Mus. Brit. ; 5 ? ? , East 

 Ecuador— Mus. Brit, and Berlepsch ; 3 ? ? , Iquitos— Mus. Brit, and Tring ; 1 ¥ , 

 Samiria — Mus. Brit. 



Although placed in another genus by Mr. Sclater, T. capitalis is merely the 

 northern form of D. sckistaceus, which it represents on the north bank of the Peruvian 

 Amazons and on the Rio Napo. The S £ ad. from East Ecuador and Iquitos have 

 the whole top of the head black, otherwise they agree with those from Chyavetas 

 and Ynrimaguas. The birds from Iquitos, referred to I), sckistaceus in the Gat. 

 of Birds, are absolutely indistinguishable from those named T. capitalis. The 

 S from Pebas is somewhat intermediate between b and c; the pileum is mainly 

 black, but the feathers show narrow slaty margins. 



Specimen dot I), sckistaceus (Cat. B. xv. p. 224) from Chamicuros, however, 

 is quite different, and belongs to Thamnomanes glaucus Cab. 

 '/. Dysithamnus sckistaceus heteroyynus Hellm. 



Teffe, Brazilian Amazons. See above. 



e. Dysithamnus dubius Berl. & Stolzm. Ibis, 1894, p. 393. 



Hub. Central Peru : La Merced, Chauchamayo (Kaliuowski) ; Chuchurras, 

 prov. Huanuco (Hoffmanns). 



This is probably also a geographical form of D. sckistaceus, but without 

 knowing the ? it would be uusafe to use a trinomial appellation. 



The $ from Chuchurras in the Tring Museum agrees nearly with that of 

 D. s. heteroyynus, but the tail is less graduated, and the bill much more slender 

 and more strongly hooked. Wing 04 ; tail 49 ; bill 20 mm. 



57. Dysithamnus ardesiacus ardesiacus Scl. & Sal v. 

 Dysithamnus ardesiacus Sclater & Salvia, /'. Z. S. 1867. p. 756 (based ou D. schistaceus Sclater 

 (uec D'Orb.), /'. Z.S. 1858. p. 66, 22'-'.— Rio Napo, East Ecuador). 

 No. 730. cf ad., 1. vi. 06. " Iris dark brown, feet grey-blue, bill black.''— 

 Wing 73 ; tail 50; bill 15J mm. 



