36 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



characters. The species may be conveniently assorted according to 

 their style of coloration, as has been done by Dr. Sclater, though I 

 would give some of his groups different limits. For example, O. florida, 

 which both he and Messrs. Salvin and Godman consider most nearly 

 allied with C. schranki and place in the same subdivision (true CalUste). 

 seems to me to be a typical " Chrysothraupis,'''' having exactly the same 

 pattern of coloration as C. aurulenta, C. pulchra^ etc. , but with their 

 brilliant orange and yellow replaced by glossy green. 



KEY TO THE SPECIES AND SUBSPECIES OF CALOSPIZA. 



«. Back streaked with black or dusky. 



b. Under parts green or yellowish, without streaks or spots, 

 c. General color yellow, the throat pale silvery buff or grayish. (Costa Eica to 



Ecuador. ) Calospiza icterocephala (p. 37) 



cc. General color green, including throat; a large black auricular patch. {Calo- 

 spiza florida.) 

 d. Larger (wing of adult male 68.1, tail 43.7) ; general color purer green; adult 

 male with a large occipital patch of pure yellow. (Costa Bica.) 



Calospiza florida florida (p. 39) 



dd. Smaller (wing of adult male 64.5-66.5, tail 40.1-41.1); general color more 



yellowish green; adult male without distinct, if any, occipital patch of 



yellow. (Veragua.) Calospiza florida arosei (p. 40) 



bb. Under parts white or pale greenish blue, spotted with black anteriorly. 

 t. Smaller (wing of adult male 68.6); lesser wing-coverts green, with central 

 spots of black; pileum green, the feathers with central spots of black. 



(Costa Rica to Ecuador, etc.) Calospiza guttata chrysoplirys (p. 40) 



cc. Larger (wing of adult male 86.4); lesser wing-coverts plain blue; pileum 

 black, the feathers margined with blue. (West coast of Guatemala.) 



Calospiza cabanisi (p. 42) 

 aa. Back without streaks. 

 b. Back bright green. 

 c. Head (except throat) bright rufous-chestnut or orange-maroon. 

 d. Rump, throat, and breast blue; outer webs of primaries green; anterior 

 lesser wing-coverta yellow; hindneck green, except a narrow band at pos- 

 terior margin of chestnut hood (sometimes obsolete). (Costa Rica to 



Bolivia. ) Calospiza gyroloides, adults (p. 43) 



dd. Rump, throat, and breast green; outer webs of primaries cinnamon-rufous; 

 anterior lesser wing-coverts green; whole hindneck saffron yellow. 



(Nicaragua to Isthmus of Panama.) Calospiza lavinia, adults (p. 46) 



cc. Head green. 



d. Under wing-coverts white or whitish Calospiza gyroloides, young (p. 46) 



dd. Under wing-coverts brownish gray Calospiza lavinia, young (p. 46) 



bb. Back not bright green. 

 c. Back black, dusky, or dull grayish green; rump blue or green. 

 d. Head mostly black; under parts of body light cinnamon; back greenish 

 black or dusky. 

 e. Lesser wing-coverts ultramarine or cobalt blue; rump bright yellowish 

 green, changing to bluish green; back greenish black. (Costa Rica; 



Veragua.) Calospiza dowi, adults (p. 46) 



ee. Lesser wing-coverts greenish blue; rump dull grayish green; back dusky. 



Calospiza dowi, young (p. 47) 



