1917.] Chapman, Distribution of Birdr-life in Colombia. 529 



with black and white instead of being whitish, narrowly and weakly barred 

 with blackish or whitish, more or less suffused with grayish or brownish 

 and irregularly marked or mottled with broken bars, shaft-streaks or hastate 

 crescents of black. 



Our three specimens are from the Atrato Valley but this form doubtless 

 extends eastward through Antioquia and southward along the Pacific 

 coast. 



Dabeiba, 2; Alto Bonito, 1. 



Family CINCLIDiE. Dippers. 



(3478) Cinclus leuconotus Scl. 



Cinclus leuconotus Scl., P. Z. S., 1857, p. 274 (New Grenada); Wyatt, Ibis, 1871. 

 p. 320 (Vetas; Matisuga); Scl. & Salv., P. Z. S., 1879, p. 492 (Retire; Frontino). 



Not uncommon on the streams of the Subtropical Zone in the Central 

 and Eastern Andes, and taken once at the base of the Western Andes. 

 Our birds are darker than old Ecuador skins which, however, have doubtless 

 faded. 



Juntas de Tamana, 1; Salento, 3; Rio Toche, 3; San Agustin, 2; 

 Fusugasuga, 1; Quetame, 1 (observed). 



Family MIMIDiE. Mockingbirds and Thrashers. 



(3492) Mimus gilvus tolimensis Ridgw. 



Mimus gilvus tolimensis Ridgw., Smith. Coll. Quart. II, 1904, p. 113 (Plains of 

 Tolima). 



Mimus melanopterus Wyatt, Ibis, 1871, p. 321 (Ocana). 



Mimus gilvus Scl. & Salv., P. Z. S., 1879, p. 492 (Medellin); Stone, Acad. 

 N. S. Phila., 1899, p. 312 (Plains of Tolima). 



Locally distributed in the more arid parts of the Tropical Zone, and 

 under favorable environmental conditions ranging upward to the Temperate 

 Zone. Specimens from Caldas are much worn but agree in size and appar- 

 ently in color with those from the upper Magdalena which are presumably 

 typical of tolimensis. A specimen from Dabeiba (see measurements) 

 agrees with this race rather than with the smaller columbianus, but another 



