2/6 BROOKI.YN INSTITUTE MUSEUM. SCIENCE BULLETIN 2. 6. 



Thamnophilus cinereoniger Pelzeln. 

 Thamnophilus cinereoniger Pelz., Zur. Orn. Bras. 1870. pp. 76, 143; 



Berlepsch & Hartert, p. 69. 



First observed at Altagracia where it was rare, and not noted as 

 common until I had gone beyond the second falls at Maipures. 



Thamnophilus murinus Sclater & Salvin. 

 Thamnophilus murinus Scl. & Salv., P. Z. S. 1867. p. 756; Berlepsch & 



Hartert, p. 69. 



Not observed on the Orinoco proper but recorded from its tribu- 

 tary the Caura River from Suapure, La Pricion and La Union. 



Erionotus naEvius naevius (Gmelin). 

 Lanius naevius Gm., Syst. Nat. L 1788. p. 308. 

 Thamnophilus naevius Berlepsch & Hartert, p. 69. 



Found along the middle river from Altagracia as far as I extended 

 my collecting on the upper river. Common above the falls. Also re- 

 corded by Berlepsch and Hartert from La Pricion, La Union and Sua- 

 pure on the Caura River. 



Erionotus cinereiceps (Pelzeln). 



Thamnophilus cinereiceps Pelz., Zur. Orn. Bras. 1870. pp. yy, 145,; Ber- 

 lepsch & Hartert, p. 70. 

 Not seen below the neighborhood of the falls of Atures. Common 



from that point beyond. 



In the American' Museum collection are specimens from Boca de 



Sina, Rio Cunucunuma, upper Orinoco. 



Hypolophus canadensis trinitatis (Ridgway). 

 Thamnophilus trinitatis Ridgw., Proc. U. S. N. M. XIV. 1891. p. 481. 

 Thamnophilus canadensis trinitatis Berlepsch & Hartert, p. 70 (in part). 

 This form of H. canadensis seems to be found throughout the delta 

 region of the Orinoco, and all specimens that I have seen from points 

 on the Caura River (there is a fair series in the American Museum, col- 

 lected by Klages at Maripa and Mato River), and four specimens col- 

 lected by the writer on the San Feliz River near its entrance into the 

 Cuchivero River, are typical trinitatis. 



