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



This form ranges from Cristobal Colon in extreme northeastern Vene- 

 zuela to the base of the Eastern Andes in Colombia. It doubtless therefore 

 occupies all of Venezuela, at least east of the Gulf of Maracaibo and 

 Colombia east of the Andes and north of Amazonia. Cyclarhis flavipec- 

 tus flavipectus I should therefore restrict to the island of Trinidad, while 

 canticus is confined to northern Colombia (and the west side of Maracaibo?) 

 southward up the Magdalena Valley. 



The characters of the form here proposed are, as might be expected, 

 best shown by the Colombian specimens taken at the western limit of its 

 range, but they are also shown, though to a less pronounced degree, in a good 

 series from the Paria Peninsula. These birds are obviously not referable 

 to the Trinidad form, and while they exhibit some approach toward canticus 

 in size (especially the shortness of the tail) and color, they are nearer parvus. 

 This proposed new form is represented in our collections by the following 

 specimens : 



Venezuela: Cristobal Colon, 7; Cumanacoa, 2; San Antonio, 2; Maripa, 

 3; Maipures, 2. Colombia: Villavicencio, 3; Buena Vista, 2. 



There appears to be no sexual variation in size and both sexes are there- 

 fore included in the appended table. 



MeasureTnenis. 



Specimens Wing Tail Ex. Culmen 



Trinidad 5 73.7 56.1 18.7 



Cristobal Colon, Ven. 5 69.5 53 17 



Maripa, " 3 69 54 16.6 



Maipures, " 2 70 53 17 



Santa Marta, Col. 5 71.4 57 16.8 



Villavicencio, 5 68.4 53.4 16.2 



(3611) Cyclarhis nigrirostris Lafr. 



Cyclarhis nigrirostris Lape., Rev. Zool., 1842, p. 133 (Colombia) ; Scl. & Salv.-, 

 P. Z. S., 1879, p. 495 (Sta. Elena). 



Inhabits the Subtropical Zone of all three ranges. A specimen from 

 Ricaurte differs from the remaining sixteen in our series in having barely 

 a trace of gray on the forehead, the underparts grayer, and the lower man- 

 dible black basally. 



Salencio, 1; San Antonio, 1 ; CerroMunchique, 2; Gallera, 1; Cocal, 2; 

 Ricaurte,!; Salento, 1; Sta. Elena, 2; RioToche, 1; LaPalma, 1; Agua- 

 dita, 1. 



