1917.] Chapman, Distribution of Bird-life in Colombia. 211 



(189a) Leptotila verreauxi occidentalis Chapm. 



Leptotila verreauxi occidentalis Chapm., Bull. A. M. N, H., XXXI, 1912, p. 142 

 (San Antonio, Col.). 



Char, subsp. — Most closely allied to Leptotila verreauxi verreauxi Bp. but upper- 

 parts, wings and tail externally much grayer, more olivaceous, forehead whiter, 

 reflections' of crown much less pronounced and obscured by grayish, underparts 

 paler, less vinaceous; flanks somewhat grayer; under tail-coverts averaging more 

 buffy. 



Common about the border of forest in the Subtropical Zone of the Wes- 

 tern Andes and western slope of the Central Andes above the Cauca Valley 

 and southward. It is interesting to observe that while this form inhabits 

 the Subtropical Zone, L. v. verreauxi is mainly a species of the Tropical Zone. 



Comparison of twenty specimens from western Colombia with twenty- 

 six specimens of L. ■». verreauxi from Trinidad, Venezuela, Santa Marta, 

 'Bogota,' and the Magdalena Valley in Colombia, Panama, Chiriqui and 

 Costa Rica, shows that the differences between the two forms»expressed in 

 the preceding diagnosis are constant, and are not bridged by individual or 

 seasonal variation. While a specimen labelled "Bogota," probably the 

 type-locality of verreauxi, is as richly colored as any bird in the series; 

 two specimens from Chicoral Bridge in the foothills of the eastern slopes of 

 the Central Andes, opposite Giradot, and a third from Puerto Berrio on the 

 Magdalena River, show some approach toward the Cauca form. 



Caldas, 1; San Antonio, 4; Gallera, 1; Cerro Munchique, 5; Mira- 

 flores, 6; Salento, 2. 



(191) Leptotila rufaxilla dubusi Bonap. 



Leptoptila dubusi Bonap., Consp. Av., Ill, 1854, p. 74 (Rio Napo). 



Leptotila rufaxilla dubusi Chapm., Bull. A. M. N. H., XXXIV, 1915, p. 369. 



Char, svhsp. — Most nearly resembling L. r. heUmayri but upperparts averaging 

 more olive, less cinnamomeus, front and sides of the throat and postocular region 

 with less pinkish cinnamon; white of throat more restricted, confined largely to the 

 chin; forehead darker; gull-gray of crown less extended posteriorly, reaching little 

 if any behind the eyes; wings and tail shorter. Easily distinguished from L. r. 

 rufaxilla by its more cinnamon upperparts, paler crown, deeper vinaceous breast, 

 small white throat area, and smaller size. 



This is the form of Amazonian Colombia whence it extends southward 

 into Ecuador and eastward to at least the upper Orinoco. 

 La Manuelita, 9; Florencia, 1. 



