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



(159) Columba subvinacea bogotensis {Berl. & Lev.). 



Chlorcenas plumbea subsp. n. bogotensis Berl. & Lev., Ornis, 1890, p. 32 (Colom- 

 bia ■ — Santa F6 de Bogota, ex praep.). 



Columba subvinacea Scl. & Salv., P. Z. S., 1879, p. 543 (Remedios) . 

 Columba plumbea bogotensis Auot. 



A series of twenty-five specimens covering the range of Columha sub- 

 vinacea berlepschi from western Ecuador to eastern Panama, and of C. s. 

 bogotensis from the Western Andes to La Morelia at the eastern base of the 

 Eastern Andes, all represent, in my opinion, one species, of which the Pacific 

 coast specimens are referable to Columba subvinacea berlepschi Hart., while 

 those from the Subtropical Zone of the Western and Central Andes and 

 Tropical Zone at the eastern base of the Eastern Andes are either inter- 

 grades or typical of the bird which is currently known as " Columba plumbea 

 bogotensis." That this bird is not a form of plumbea is apparently proven 

 by the occurrence of a race of plumbea, at Buena Vista to the north of, and 

 in the same zone as La Morelia, whence we have a specimen of bogotensis. 

 That bogotensis is a representative of, and probably intergrades with sub- 

 vinacea berlepschi, is indicated by two specimens from San Antonio in the 

 Western Andes which were doubtless taken on the Pacific slope of the range, 

 and one from above Novita in the same range. These birds, as the appended 

 table of measurements shows, are intermediate in size between berlepschi 

 and bogotensis. In color the two San Antonio specimens are nearer to ber- 

 lepschi than they are to bogotensis, as that species is represented by speci- 

 mens from La Candela on the Magdalena slope of the Central Andes; but 

 the Novita specimen agrees absolutely in color with average specimens of 

 bogotensis. Seven specimens from the Central Andes are essentially alike 

 and may be considered typical of bogotensis. Compared with fourteen 

 specimens of berlepschi from the Pacific coast (Naranjo, Guaymas, Ecuador, 

 to Tacarcuna, eastern Panama), bogotensis is much larger, the underparts 

 less cinnamomeus and less uniformly colored, the purplish vinaceous of the 

 back being more or less mixed with olive; the wings are more olive exter- 

 nally and somewhat less rufous internally. 



Intergradation between these two forms appears to occur at the northern 

 end of the Western Andes where their ranges actually meet. With an ap- 

 preciable increase in size (see table of measurements) and approach toward 

 bogotensis in color, berlepschi reaches the summit of the Western Andes at 

 San Antonio, above Call. Its further eastward extension here is prohibited 

 by the lack of forest growth and specimens from the western slope of the 



