CHERRIE: ORNITHOLOGY OF THE ORINOCO REGION. 281 



DYSITHAMNUS AFFINIS ANDREI Hellmayr. 



Dysithamnus affinis andrei Hellmayr, Novit. Zool. XIII. 1906. 31 (Type, 

 5 ad ex Caparo, Trinidad). 



Mr. C. William Beebe obtained a specimen at Guanoco in the 

 Orinoco delta, which compared with examples from Trinidad, showed 

 itself to be the island form. 



THAMNOMANES GLAUCUS Cabanis. 



Thamnomanes glancus Cab., Wiegn-Arch. 1847. P- 2 3- PI- 35 Berlepsch 



& Hartert, p. 71 (Munduapo, Nericagua, Bichaco, Orinoco River; 



Suapure, La Pricion, Nicare and La Union, Caura River, Venez.). 

 T[hamnomanes] c[aesius] glaucus Hellmayr, Novit. Zool. XIII. 1906. 



p. 368 (Orinoco region; Munduapo, Caura River). 

 T [hamnomanes] caesius glaucus Hellmayr, Novit. Zool. XIV. 1907. p. 



65. (Munduapo and Bichaco, Orinoco River, Venez.). 



Common on the upper Orinoco but not .observed below the falls 

 of Maipures. 



In the American Museum is a series collected by Klages at La 

 Union and Suapure on the Caura River. 



I prefer to consider this as a distinct species and not as a race of T. 

 caesius (Licht.) the large concealed white dorsal patch at once distin- 

 guishing it from caesius caesius and the two races hoffmannsi and per- 

 similis of that species. Also I believe T. caesius schistogynus Hellmayr 

 should be accorded specific rank, the much greater development of the 

 rictal bristles (not mentioned by its describer) and the very differently 

 colored female distinguishing it at once from other Thamnomanes. 



MYRMOPAGIS SCHISTOCOLOR INTERIOR Chapman. 



Myrmopagis schistocolor interior Chapman Bull. A. M. N. H. XXXIII : 

 1914: p. 614 (Type ex Buena Vista, above Villavicencio, Eastern 

 Andes, Colombia) Suapure and Mato Riv. ; Foot Mt. Duida, Ori- 

 noco Riv: 



Mr. Chapman in discussing the races of schistocolor states that the 

 specimens from the Upper Orinoco and from Caura river points are 

 intergrades between s. sanctae-martae and s. interior. The upper Ori- 

 noco birds probably represent an undescribed form. 



