CHERRIE : ORNITHOLOGY OF THi; ORINOCO RE;GI0N. 287 



Taken by the writer on the upper river at Munduapo, but not 

 noted elsewhere. It is also recorded froni, points on the Caura River. 



Cercomacra tyrannina tyrannina (Sclater). 

 Pyriglciia tyraiiniiia 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 nigricaiis 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 argentata 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 LTnion 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 S. 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.). 

 Heterocncmis argentata Berlepsch & Hartert, Novit. Zool IX. 1902. p. 76 



(part) 



