276 BROOKL,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 liad gone beyond the second falls at Maipures. 
Thamnophilus murinus Sclater & Salvin. 
Thamnophilus miiriinis 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 Canra River from Suapure, La Pricion and La L^nion. 
Erionotus naEvius naevius (Gmelin). 
Laiiiiis inieriiis 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. 
HvpoLOPiius canadensis trinitatis (Ridgway). 
Thamnophilus trinitatis Ridgw., Proc. U. S. N. M. Xl\". 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 
Cuchixero River, are typical trinitatis. 
