J ^; 2 3 °] BANGS CHIRIQUI BIRDS 49 



Merula nigrescens (Cab.). 



Twenty-four specimens, both sexes, Volcan de Chiriqui, 10,000 

 to 11,100 feet, May and June. Mr. Brown did not see this 

 species below 10,000 feet. 



Merula obsoleta (Lawr.) . 



One male, Caribbean slope of Volcan de Chiriqui, 4500 feet, 

 June 13. 



Merula plebejus (Cab.). 



Four adults, both sexes, Boquete, 4000 to 7000 feet, February 

 and April. All four have larger bills than Costa Rica specimens, 

 but otherwise are similar. 



Merula leucauchen dagnae (Berlepsch). 



Nine specimens, both sexes,. Boquete, 4000 to 5000 feet, 

 January to April. The type locality of this form is western 

 Colombia. All Chiriqui birds appear to belong to it, differing 

 from true M. leucauchen in smaller size, and darker brown upper 

 parts. 



Merula grayii casius ( Bp.) . 



Seven specimens, both sexes, Boquete, 4000 to 4500 feet, 

 January and March. 



Hylocichla ustulata swainsonii (Cab.). 



Five specimens, both sexes, Boquete, 4000 to 4800 feet, March 

 24 to April 4. 



