(374 ) 



Cnmana (Caracciolo coll.), S. Esteban, near Puerto Cabello (Goering and Starke 

 coll.). Colombia : Bio Meta (Wheeler coll.)- East Ecuador: Rio Napo (Petit coll.). 



North Brazil : Rio Amajaii, a tributary of the lower Rio Negro (Natterer coll.). 



Adult. Differs from R. m. melanoma in having the back smoky or earthy 

 brown, in decided contrast to the rnfescent pilenm ; and the cheeks, ear-coverts, 

 and sides of the neck deep ochraceous. — Wing 48— 54; tail 43 — 48; bill 21 — 23 mm. 



Material. 1 <?, 1 ? , Caparo, Trinidad (Andre 1 coll.) ; 7 (ad. and young) ( lamana ; 

 1 ad., S. Esteban (Starke coll., Mns. v. Berlepsch) ; 1 ? ad., S. Esteban (Goering 

 coll., Brit. Mus.) ; 1 ad., Villaviccncio, Rio Meta, Colombia (Wheeler coll., 

 Brit. Mus.) ; 7 (ad. and young) Caura River (Andre and Klages coll., Mus. Tring) ; 

 <? jr., c? ad., ? ad., Munduapo and Nericagua, Orinoco ; 1 ad., Rio Napo (Mus. 

 Tring) ; 1 c? ad., Rio Amajau (Natterer, Vienna Mus.). 



Obs. There is no constant difference between specimens from the above 

 localities, though, as a rule, those from the north coast of Venezuela (Cnmana, 

 S. Esteban) are paler underneath, the foreneck and sides of the body alone being 

 bright buff. In the others the under parts are for the greater part deep ochraceous 

 buff, as in R. m. melanurus. The $ from the Rio Amajau and several specimens 

 from the Caura, however, agree exactly with those from Cnmaml. 



The bright ochraceous sides of the head serve to distinguish this form at a 

 glance among the other South American races. About the subspecific name 

 cf. Nov. Zool. xiii. p. 32. 



c. R. melanurus albiventris Scl. 

 Eamphocaenus albiventris Sclater, Ibis, 1883. p. 95 (Surinam). 



Ilab. Surinam (C. Bartlett) ; Cayenne (Jelski) ; British Guiana : Bartica 

 Grove, Camacnsa, Quouja, Aunai (Whitely jr.). 



Adult. Differs from the two preceding forms in having the whole under-surface 

 pure white, the innermost flanks alone being pale greyish. The sides of the head 

 are whitish, the posterior portion of the ear-coverts washed with pale brownish, 

 and the sides of the neck are but slightly tinged with pale ochraceous buff. Upper 

 parts as in R. m. trinitatis. Wing 47 — 50 ; tail 45 — 49 ; bill 20J — 22 mm. 



Material. 1 ad., Surinam (C. Bnckley coll. : Brit. Mus. type of 11. albiventris) ; 

 c? ? , Aunai (Tring Mus.) ; <J Bartica Grove, 1 ? Qnonja, 1 adult Camacnsa, all 

 collected by Whitely, and one adult from British Guiana (without any further 

 locality, Quelch coll.), in the British Museum. 



Obs. I have pointed out (supra, p. 67) that the specimen from Surinam is 

 to be considered as the type. The one from S. Esteban, erroneously registered 

 as such in the Cat. Birds xv. p. 261, turned out to belong to another form (see 

 sub R. m. trinitatis). 



d. R. m. amazonum Hellm. 



Cf. supra. 



Ilab. Western Brazil: Teffe, Rio Solimoes (Hoffmanns); Ilumaytba and 

 Borba, Rio Madeira (Hoffmanns). North Peru: Chyavetas, Santa Cruz (Bartlett), 

 Ynrimaguas (Bartlett & Stolzmann coll.). 



Adult. Agrees with A'. ///. albiventris in the sides of the head being white, 

 shaded with pale brownish on the posterior portion of the ear-coverts; but the 

 top of the head is dull sepia brown like the back, the sides of the neck are much 

 paler, crenmy-bnff (Ridgw. v. 11), not, ochraceous ; and the foreneck as well as 



