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



(1815) Myornis senilis (Lafr.). 



Merul[axis] senilis Lafr., Rev. Zool., 1840, p. 103 ("Bogota"; type examined). 

 Myornis senilis Chapm., Auk, XXXII, 1915, p. 410. 



Inhabits the Temperate Zone of both the Central and Eastern Andes. 

 Laguneta, 1; El Pinon, 1. 



(1836) Acropternis orthonyx (Lafr.). 



Merulaxis orthonyx Lafb., Rev. Zool., 1843, p. 131 (Colombia). 

 Acropterynx orthonyx Scl. & Salv., P. Z. S., 1879, p. 528 (Sta. Elena). 



Two specimens collected by Allen at Laguneta in the Temperate Zone 

 are the only ones secured by our expeditions. They agree with others from 

 ' Bogota ' and Merida, Venezuela. 



Laguneta, 2. 



Family C0N0P0PHAGID.(E. Gnateatees. 



(1839) Conopophaga aurita (Gmel.). 

 Turdus auritus Gmel., Syst. Nat., I, 1789, p. 827 (Cayenne). 



Found only in the Tropical Zone of Amazonian Colombia. An adult 

 male is considerably smaller than one from British Guiana, has the back 

 browner and with fewer black margins, while the breast is paler and the 

 abdominal region more suffused with ochraceous. If the differences named 

 are constant, the bird from the base of the Andes is deserving of separation. 

 An adult female more nearly resembles the Guiana male in the color of the 

 parts named. I have no female from Guiana. 



La Morelia, 2; Florencia, 1. 



(1846) Conopophaga castaneiceps castaneiceps Scl. 



Conopophaga castaneiceps Scl., P. Z. S., 1857, p. 47 (Bogotd). 



Not rare in heavy forests of the lower part of the Subtropical Zone in 

 the Eastern Andes at the head of the Magdalena, but retiring in habits and 



