1917.] Chapman, Distribution of Bird-life in Colombia. 215 



the Ambato specimen is nearer the Central Andean form. Unfortunately 

 I have no specimens from the type-locality, west of Quito, nor do I know 

 whether the Ambato bird came from the eastern or western slope of the 

 Andes. Since, however, it resembles in make and came with a collection 

 containing specimens of Oscidatia sapphirina, it is probably from the 

 eastern slope. The occurrence of the species on that slope is shown by a 

 specimen collected by Richardson at Zamora. This bird is in postjuvenal 

 molt. So far as its adult plumage has appeared it resembles that of the 

 west slope, gray-breasted bird, but its immaturity makes it impossible to 

 draw satisfactory conclusions from its color. Under this theory we should 

 have the gray-breasted form confined to the Pacific slope and extending 

 northward into Colombia along the Western Andes; while the vinaceous- 

 breasted bird is found on the Amazonian slope and ranges northward into 

 Colombia along the Central Andes. The case is paralleled by the distribu- 

 tion in Ecuador and Colombia of Rupicola peruviana sanguinolenta and R. 

 p. aurea. 



Possibly in this slight geographic variation we have the origin of Oreo- 

 peleia erythropareia (Gray). Salvadori (Cat. Bds. B. M., XXI, p. 578) em- 

 phasizes the fact that the breast in this form is "brown-grey" rather than 

 "greyish-brown," as he describes hourcieri, a statement which suggests that 

 the type of erythropareia (which is without definite locality) is really refer- 

 able to true hourcieri. In any event, however, I do not feel that the varia- 

 tions shown by our series of twenty-six specimens are sufficienth* constant 

 to warrant the recognition of two forms. 



Salencio, 1 ; San Antonio, 4 ; La Florida, 1 ; Cocal, 1 ; Cerro Munchique, 

 1 ; Gallera, 1 ; Almaguer, 1 ; Miraflores, 1 ; El Roble, 1 ; Laguneta, 1 ; La 

 Candela, 4. 



(209) Oreopeleia linearis linearis {Prev. & Knip). 



Columba linearis Prev. & Kxip, Pig. et Gallin., II, 1838-43, p. 104, pi. 55 (Bogotd) . 

 Geotrygon linearis ScL. & Salv., P. Z. S., 1879, p. 544 (Sta. Elena). 



In the Eastern Andes, found by us only in the Subtropical Zone where 

 it is not uncommon. Sclater and Salvin record {I. c.) this species from 

 Sta. Elena, near Medellin, and Miller confirms this somewhat unexpected 

 record by securing a perfectly typical specimen at Puerto Valdivia. In the 

 comparative restriction of the bluish gray to the sides of the head, and 

 extension of the cinnamon-vinaceous to the nape, four of our specimens 

 (including two from Buena Vista) agree with a topotype of '' venezuelensis" 

 from Merida. Three young birds from Merida show that this character is 



