CHERRIE: ORNITHOLOGY OF THE ORINOCO REGION. 287 
Taken by the writer on the upper river at Munduapo, but not 
noted elsewhere. It is also recorded from, points on the Caura River. 
Cercomacra tyrannina tyrannina (Sclater). 
Pyri(/lciia tyrannina ScL, P. Z. S. 1855. p. 90. 
Cercomacra tyrannina Berlepsch & Hartert, p. 76. 
Cercomacra tyrannina tyrannina, Ridgw. Bds. N. and M. Amer., V: 
1911 : 93 (Points on Orinoco and Caura rivers). 
Abundant on the upper river from just below the falls of Atures 
as far as I ascended. Not noted elsewhere by me, but recorded by 
Berlepsch and Hartert from various points on the Caura River. 
Cercomacra nigricans Sclater. 
Cercomacra nigricans Scl. P. Z. S. 1858. p. 245; Berlepsch & Hartert, 
p. 76. 
Noted as abundant in the delta region at Las Barrancas but 
much less common along the middle stretches of the river up as far 
as the mouth of the Apure. Orinoco birds seem to be identical with 
American Museum specimens from the Caura River, Colombia, Santa 
Marta and from Panama. 
ScLATERiA argEntata (Des Murs). 
Herpsilochmus argentatus Des Murs, Voy. Casteln, Ois. (1855). p. 53. 
fig- 2. 
Sclateria argcntata Oberholser, Proc. Phil. Acad. LI. 1899. p. 210: Hell- 
mayr, Novit. Zool. XIV. 1907. p. 375 (Maipures, Orinoco). 
Heterocncmis argentata Berlepsch & Hartert, Novit. Zool. IX. 1902, p. 
76 (part) (Maipures, Orinoco River). 
Rare, met with at Maipures. only, during December. Specimens 
collected at La Union on the Caura River by Andre were also included 
under H. argentata by Berlepsch and Hartert, but have since been 
separated as a subspecific form of 6*. schistacea by Mr. Hellmayr. 
Sclateria schistacea caurensis Hellmayr, 
Sclateria schistacea caurensis Hellmayr, Bull. Brit. Orn. Club. XIX. 1906. 
P- 9 (Type, $ ad. ex. Caura River, Venez.). 
Heterocnemis argentata Berlepsch & Hartert, Novit. Zool IX. 1902. p. 76 
(part) 
