ART. 7 EEVISION OF THE GEXUS BASILEUTERFS TODD 57 



Chapman had succeeded in securing specimens of typical tristriatus, 

 and was led to describe the Bolivian bird under the above appropri- 

 ate name. It is certainly very different from true tristnatus, as he 

 pointed out, more nearly resembling the form of the Eastern Andes, 

 B. t. miHcralaris^ than which it is much duller and paler below, with 

 more spotting, and slightly duller green above. The color of the 

 under parts is much closer, indeed, to that of B. t. daedalus^ but is 

 more yellowish and not so decidedly buffy, with decided spotting; 

 the upper surface is more olivaceous, less brownish. It is paler 

 below than B. t. inelanwtis^ with more spotting; the median crown- 

 stripe is tinged with yellow, not orange brown. 



This form seems to be a distinct development of the B. tristriatus 

 group, marking its southernmost extension in the Andes. Doctor 

 Chapman remarks on the characters separating it from tristriatus 

 proper, with which it shows no sign of direct intergradation, al- 

 though close to it geographically. He keeps it as a race of the latter 

 mainly because of its closer resemblance to the Colombian forms, 

 whose racial relationship to tristriatns is sufficiently obvious, but 

 intergradation with these would appear to be a geographical im- 

 possibility, and it is a question whether punctipectus had not better 

 stand as a species by itself. All its characters, however — even the 

 spotted breast — are merely modifications of those of fri-striaius and 

 not new developments. Two specimens from Inca Mine, Peru, and 

 two from Santo Domingo, Peru (in the collection of the American 

 Museum of Natural History), I refer to jnmctipectus provisionally, 

 but they are not typical, lacking as they do in large measure the 

 characteristic spotting below. They may possibly represent an inter- 

 grading race. Seven specimens in the von Berlepsch collection from 

 Bolivia (Chaco, Quebrada Honda, and San Jacinto) are different 

 again, not only lacking the spotting for the most part but also being 

 more brightly colored below. More material is requisite to deter- 

 mine the status of the birds of these regions. 



Our specimens are marked " iris brown ; bill brownish black above, 

 bone white below ; feet light brown." 



Specimens examined. — Peru : Inca Mine, 2 ; Santo Domingo, 2. 

 Bolivia: Chaco, Yungas, 2; Quebrada Honda, 3; San Jacinto, 1; 

 Samaipata, 1; Incachaca, 6; Yungas de Cochabamba, 6; Locotal 

 (5,800 feet), Cochabamba, 4 (including type); Roquefalda, 3, 

 Mapiri, 1 ; unspecified, 2. Total, 33. 



BASILEUTERUS TRISTRIATUS TRISTRIATUS (von Tschudi) 



MijiodiGctes tristriatus von Tschudi, Arch. f. Naturg., vol. 10, 1844, p. 283 

 ( Peru ; orig. clescr. ; type iu coll. Mus. Neuchtitel ) ; Fauna Peruana, Aves, 

 1845-6, p. 193 (Peru; descr.). 



Basileuterus tristriata Bonaparte, Consp. Avium, vol. 1, 1850, p. 314 (in 

 list of species.) 



