1917.] Chapman, Distribution of Bird-life in Colombia. 519 



the Boston Society of Natural History. It is doubtful, however^ even if it 

 exists, that it would be of much value in the present connection. Lafres- 

 naye's description of the underparts of his bird as " subtus pallidior, Iffiviter 

 ochraceo tinctus" might apply to any of the three forms in question, though 

 it more strongly suggests the bird inhabiting the Temperate Zone. To 

 this form, however. Stone's name of columbae is unmistakably applicable. 

 Under the circumstances, therefore, it seems advisable to fix Lafresnaye's 

 name on the bird occupying the Tropical and Subtropical Zones of the 

 Magdalena Valley slope of the Eastern Andes. This, too, is the form 

 occurring throughout the greater part of Andean Colombia and this course 

 leaves the name striatulus with much the same meaning as heretofore. 

 I consequently suggest Honda as the definite type-locality for the bird 

 described by Lafresnaye. 



As thus restricted, striatulus is a bird with grayish olive-brown back and 

 whitish or centrally whitish underparts the sides and flanks being more or 

 less washed with white, the under tail-coverts usually with well defined 

 bars. From columbce, of the Temperate Zone, it may be readily known by 

 its white or whitish underparts. 



Our collections unfortunately contain only one specimen Prom the upper- 

 part of the Subtropical Zone of the western slope and it is typical columbce. 

 Beyond, therefore, a native skin labelled "Anolaima Feb. 4, 1913," I have 

 seen no intermediate between striatulus and columbce. A second native 

 specimen labelled ' Anolaima, Feb. 5, 1913,' is typical striatulus, indicating 

 that Anolaima is near the zone of intergradation. Probably the first- 

 named specimen was taken above the town, the second below. However 

 this may be, the case illustrates the necessity for more accurate labelling 

 than even a well-intentioned native collector can supply. On the eastern 

 slope a specimen from Quetame (alt. 4800 ft.), where certain Temperate 

 Zone forms reach an exceptionally low altitude, in its paler underparts 

 approaches the form from the eastern base of the Andes, for which I have 

 proposed the name Troglodytes musculus neglectus. 



Specimens from the head of the Magdalena Valley, the Central Andes, 

 Cauca Valley and Western Andes are referable to striatulus, as above de- 

 fined, but seven specimens from Tumaco and Barbacoas in southwestern 

 Colombia which in their shorter tail, more rufescent rump, and ventral 

 region, show an approach to albicans (of which I have a representative 

 series), so closely duplicate in color and size the birds from Buena Vista at 

 the eastern base of the Andes, that if we name facts rather than 'forms' of 

 our own creation, the name applied to one should be applied to the other. 

 With this comment these specimens are listed under striatulus as inter- 

 grades between it and albicans. 



