154 BULLETIN 50, UNITED STATES NATIONAL MUSEUM 



Genus CHLOROTHRAUPIS Ridg-way. 



Chloroilirmipis " Ridgway, Pr. U.S. Nat. Mus., 1883," Salvin and Godman, 

 Biol. Centr.-Am., Aves, i, Dec, 1883, 297.— Ridgway, Proc. U. S. Nat. Mus., 

 vi, no. 26, Apr. 11, 1884, 412. (Type, Phcenicothraupis carmioli Lawrence.) 



Medium sized, plainly colored Tanagers related to PJuBnicothraupis, 

 but with tail decidedly shorter than wing from bend to tips of second- 

 aries, and with feathers of crown not elongated; sexes alike in color, 

 olive-green above, more yellowish below. 



Bill strong, with nearly straight outlines but decurved at tip, rather 

 deeper than broad at base, the basal depth nearly equal to length of 

 gonys; exposed culmen about five-sixths as long as tarsus, slightly 

 convex or nearlj^ straight to near tip, where distinctly decurved and 

 moderately uncinate; gonys decidedly shorter than distance from nos- 

 tril to tip of maxilla, slightly convex, ascending terminalh^; maxillary 

 tomium slightlj^ notched subterminally, nearly straight, but percep- 

 tibly convex in middle portion. Nostril exposed, longitudinal, very 

 small, narrow, with broad superior membrane. Rictal bristles dis- 

 tinct. Wing about four times as long as tarsus, rounded (seventh to 

 fifth primaries longest, ninth shorter than third); primaries exceeding 

 secondaries by much less than length of tarsus. Tail about two-thirds 

 as long as wing or a little more, slightl}'^ rounded, the rectrices rather 

 narrow, with slightlj' pointed tips. Tarsus decidedly longer than 

 middle toe with claw; lateral claws reaching about to base of middle 

 claw; hind claw decidedly shorter than its digit. 



CoJoratum. — Uniform dull olive-green above, lighter and more yel- 

 lowish below. 



Ravge. — Costa Rica to Peru. (Three species.) 



This genus comes nearest, apparently, to Plra7iga, from which it 

 differs chiefly in its more I'ounded wing, shorter, more rounded tail, 

 and dull coloration of the adult male. 



KEY TO THE SPECIES OF CHLOKOTHEAUPIS. 



<i. Supraloral streak and orbital ring yellow. (Isthmus of Panama to Ecuador.) 



Chlorotliraupis olivaoea, adults (p. 154) 



aa. No yellow on sides of head. (Costa Rica to Peru.) 



Chlorothranpis carmioli, adults (p. 155) 



CHLOROTHRAUPIS OLIVACEUS (Cassin). 

 YELLOW-BKOWED TANAGER. 



Adults {sexes alike?). — Above plain bright olive-green, becoming 

 darker on pileum; anterior margin of forehead, supraloral line, and 

 orbital ring lemon yellow, the sides of head otherwise olive-green, 

 like hindneck, becoming somewhat duskj^ toward rictus and dull gray- 

 ish olive on lores; an indistinct line of olive-yellowish along lower 

 edge of malar region; chin and throat canary yellow medially, olive- 



