1917.] Chapman, Distribution of Bird-life in Colombia. 525 



mandible, heavily marked malars, dark gray sides, rich rufouS flanks, brown 

 crown, bright rufous back, etc., by which this species is distinguished. In 

 the succeeding zone, at an altitude of 5000 feet, and directly above localities 

 at which we have found inornata, it is apparently represented locally by 

 Henicorhina prostheleuca eucharis, but we have yet to discover intermediates 

 between the two. In fact, as stated under //. p. eucharis, the relationships 

 of this race appear to be with H. p. pittieri of Costa Rica to Panama, rather 

 than with the geographically nearer eucharis. 



Novita, 3; San Jose, 2; Barbacoas, 3; Buena vista, Narino, 2. 



(3457) Henicorhina leucophrys guttata {Hartl.). 



Troglodytes guttatus Hartl., Syst. Verz. d. Ges. Mus. Brem., 1844, p. 28 (New 

 Grenada). 



Henicorhina leucophrys ScL. & Salt., P. Z. S., 1879, p. 493 (Frontino). 



Henicorhina leucophrys berlepschi Ridgw., Proc. Biol. Soc. Wash., XVI, 1903, 

 p. 168 (Chimbo, Ecuador). 



A common bird in fallen tree-tops, or dense undergrowth, in the luxuriant 

 forests of the Subtropical Zone of all three Andean ranges. 



At Chipaque (alt. 8500 ft.) it occurred in the wooded ravines which, 

 faunally, are finger-like extensions of the Subtropical Zone, penetrating the 

 Temperate Zone. At Buena Vista (alt. 4500 ft.), above Yillavicencio, the 

 capture of a single specimen indicated the proximity of this locality to the 

 Subtropical Zone. This Buena Vista specimen, it should be remarked, is 

 more cinnamomeus and less rufescent than any other bird in our Colombian 

 series. 



A series of seventy-three specimens, showing both juvenal and adult 

 plumages, and representing every month in the year, but August, affords 

 satisfactory material for the study of the color variations of this species. 

 In the general tone of the back there is surprisingly little variation in the 

 color of this part which resembles that of Peruvian specimens of leucophrys. 

 In the underparts there is some variation in the intensity of color of the 

 breast and throat and the latter is, in some specimens, lightly streaked with 

 blackish; all this, however, appears to be purely individual. There is 

 also some variation in the extent and intensity of the rufous on the flanks 

 and in the barring of the tail, and this is evidently, in part, geographical. 

 Bogot£ region birds have, on the average, the flanks less extensively rufous 

 and the tail more distinctly barred; these differences, however, are too 

 slight and inconstant to warrant recognition by name. 



The greatest variation occurs in the color of the crown which in birds 

 from the same locality varies from warm mummy-brown or Prout's-brown 



