446 Bulletin American Museum of Natural History. [Vol. XXXVI,. 



This fact, in connection with the bird's degree of differentiation, sug- 

 gests its specific distinctness, but although I believe that actual intergra-, 

 dation does not occur I feel that the bird's relationships are best expressed 

 by a trinomial. We are indebted for the type and only specimen of this 

 new form to Brother Apolinar Maria, Director of the Instituto de la Salle, 

 of Bogota, whom we have to thank for invaluable cooperation in our study 

 of the birds of that region. 



(2858) Pogonotriccus poecilotis (Scl). 



Leptopogon pxcilotis Sol., P. Z. S., 1862, p. Ill (Bogotd); Scl. & Salv., P. Z. S., 

 1879, p. 512 (Concordia). 



Inhabits the Subtropical Zone of all three ranges. An old 'Bogota' 

 skin is essentially hke a fresh one from near Fusugasuga with which the 

 remaining birds in the series agree. 



San Antonio, 2; Cerro Munchique, 2; Miraflores, 1; Salento, 3; Rio 

 Toche, 1; La Candela, 2; Aguadita, 1. 



(2860) Pogonotriccus opthalmicus Tacz. 



Pogonotriccus opthalmicus Tacz., P. Z. S., 1874, p. 135 (Amable-Maria, cen.. 

 Peru). 



Pogonotriccus alleni Obbrh., Proc. U. S. N. M., XXV, 1903, p. 65 (Rio Cauca). 



Occurs in the Subtropical Zone of the Western and Central Andes in- 

 cluding the eastern slope of the last-named range. I have seen no Peru- 

 vian specimens and follow Hellmayr, who has examined Oberholser's type 

 (A. M. N. H. No. 71758), in referring the bird of the Cauca region to opthal- 

 micus. 



Salencio, 1; Las Lomitas, 3; San Antonio, 1; Cerro Munchique, 1; 

 Gallera, 3; Salento, 2; Rio Toche, 1. 



(2863) Oreotriccus ' plumbeiceps {Lawr.). 



Pogonotriccus plumbeiceps Lawr., Ann. Lye. Nat. Hist., N. Y., IX, 1870, p. 267 

 (Bogotd). 



Inhabits the Tropical Zone of all three ranges. Seven specimens agree 

 with a ' Bogota' cotype in the Lawrence collection (A. M. N. H., No. 42480). 



Las Lomitas, 1 ; San Antonio, 1 ; Gallera, 1 ; Miraflores, 1 ; Salento, 1 ; 

 La Candela, 2. 



1 Replacing Oreomyias, preoccupied, Cf. Richmond, Proc. Biol. Soc. Wash., XXVIII, 1915, 

 p. 180. 



