554 Annals of the Carnegie Museum. 



Popelaria conversi Ridgway, Proc. U. S. Nat. Mus., Ill, 1880, 315 (Costa Rica). 

 Popelairea conversi (typica) Hartert, Tierr., 1900, 223 (Costa Rica to Colombia). 



U. S. Nat. Museum : Bonilla (Ridgway) (Basulto). 



Bangs Collection : La Hondura, Carrillo, Cariblanco de Sarapiqui 



(Underwood). 

 C. H. Lankester Collection : Cachi. 



The Costa Rican range of this beautiful species is confined to the 

 Caribbean slope, where it inhabits the cool, damp forests between an 

 altitude of about 1,000 and 3,000 feet. The bird has been taken more 

 abundantly at Carrillo than at any other place, although not a common 

 bird there by any means. It is perhaps present in southeastern Costa 

 Rica, although I have never observed it there. 



Family TROGONID^E. 



Key to the Costa Rican Species. 



I. $ and ° with at least a portion of the abdomen and under tail-coverts red or 

 reddish. 

 a. Two cential rectrices bronzy-green, greatly elongated. 



Pharomacrus mocinno costaricensis, $ . 

 aa. Two central rectrices not greatly elongated. 



b. Upper parts bright metallic-green or bluish, with or without bronzy 



shading. 



c. Upper parts mostly purplish-blue, mixed with some green on the 



back; chest dull purplish-black; exposed portion of three outer 



rectrices pure white. Trogon bairdi, $ . 



cc. Upper parts green or bronzy-green. 



d. Size large (wing and tail equal, seldom less than 160 mm.); 

 tail plain-colored, or, if barred, bars very narrow, form- 

 ing mere lines: no white line between green of chest 

 and red of breast. 

 e. Tail plain sooty-gray. Trogon massena, <?^ 



ee. Tail sooty-black, regularly barred with fine white lines 

 (about 4 mm. apart) on most of three outer rectrices. 



Trogon clathratus, $ . 

 dd. Size small (wing not more than 130; tail 140 mm.); green 

 of chest separated from red of breast by a white 

 band; tail black, barred narrowly with white. 

 e. Red of lower parts deep rich vermilion. 



/. Three outer rectrices tipped with white, with the 

 remainder of visible portion evenly, and very 

 finely, barred with black and white. 



Trogon elegans, $ . 

 f. Three outer rectrices black, without white tips and 

 with narrow white bars far apart. 



Trogon puella, $ . 



