Carriker : List of the Birds of Costa Rica. 555 



ee. Red of lower parts pale orange. Trogon underwoodi, $ , 

 bb. Upper parts never green, but either brown, or plain ashy-gray. 

 c. Upper parts and breast plain ashy-gray. 



d. Size large, (wing not less than 160 mm.); red of belly deep 



scarlet; no white on outer edge of primaries. 



e. Tail plain sooty-gray below, without markings; no buff y 



edging to tertials. Trogon massena, 9 . 



ee. Three outer rectrices tipped with white, and outer webs 



faintly blotched with white; tertials edged with buffy- 



ochraceous. Trogon clathratus, 9 • 



dd. Size smaller (wing not more than 145 mm.); red of under 



parts dark orange; outer webs of primaries notched with 



white; outer rectrices tipped and barred with white on 



outer web. Trogon bairdi, 9 • 



cc. Upper parts and breast brown, also two middle rectrices. 



d. Brown color dark and rich; red of belly rich vermilion. 



e. Tips and outer webs of three outer rectrices (with small 

 portion of inner webs) grayish white, with barring. 



Trogon puella, 9 • 



ee. White on three outer rectrices without admixture of gray, 



and with both webs of apical portion of feather crossed 



at intervals with narrow black bars. Trogon elegans, 9 • 



dd. Brown color paler and grayer; belly pale orange. 



Trogon underwoodi, 9 • 

 II. $ and 9 without red on any portion of the body; belly yellow. 

 a. Back and two central rectrices bronzy-green. 



b. Pileum and chest, as well as back, bronzy-green; three outer rectrices 

 broadly tipped and closely barred with white. 



Trogon atricollis tenellus, $ . 

 bb. Pileum and throat black or blue-black; yellow of belly darker. 



c. Chest metallic blue-green; no blue on rump; three outer rec- 

 trices broadly tipped and evenly barred on both webs with 

 white. Trogon caligatus, $ . 



cc. Chest slaty-black, like throat and pileum; rump purplish-blue; 

 three outer rectrices broadly tipped with white, but no bars. 



Trogon melanocephalus illcetabilis , $ . 

 aa. Back and central rectrices either brown or ashy-gray, never green. 

 b. Back and chest plain ashy. 



c. Wing coverts and tertials with wavy white bars; three outer rec- 

 trices tipped and barred on outer web with white. 



Trogon caligatus, 9 • 

 cc. Coverts and tertials plain sooty-gray; three outer rectrices 

 broadly tipped, but not barred, with white. 



Trogon melanocephalus illcetabilis, 9 • 



bb. Back and chest brown; coverts freckled with dusky and buffy-brown; 



three outer rectrices broadly tipped and barred on both webs with 



white. Trogon atricollis tenellus, 9 • 



