154 BULLETIN 50, UNITED STATES NATIONAL MUSEUM 



Genus CHLOROTH R AU PIS Ridgway. 



CldoroOivdiipiit '■ lii(lo;\vay, Pr. U. S. Nat. Mu.*., 1883," Salvin ami Godman, 

 Biol. Centr.-Am., Aves, i, Dec, 188;',, 297.— Ridgway, Proc. V. S. Nat. Mus., 

 vi, no. 2(), Apr. 11, 1884, 412. (Type, Phcenicothraiipu carmioll Lawrence.) 



Medium sized, plainly colored Tanagers related to PJicenicotJir<nipis. 

 but with tail decidedly shorter than wing- from l)end to tips of second- 

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

 olive-green al)o\'e, more yellowish ])elow. 



Bill strong, with nearh' straight outlines l)ut decurved at tip, rather 

 deeper than l)road at ])ase, the l)asal depth nearly ecjual to length of 

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

 convex or nearly straight to ni>ar tip, where distinctly decurved and 

 moderately uncinate; gonys decidedly shorter than distance from nos- 

 tril to tip of maxilla, slightly convex, ascending terminally; maxillary 

 tomium slightly notched subterniinally, nearly straight, but percep- 

 tit)ly convex in middle portion. Nostril exposed, longitudinal, very 

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

 tinct. ^^'ing aliout four times as long as tarsus, rounded (seventh to 

 hfth 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, slightly rounded, the rectrices rather 

 narrow, with slightly pointed tips. Tarsus decidedly longer than 

 middle toe with claw; lateral clawN reaching a])out to l)ase of middle 

 claw; hind claw decidiHlly shorter than its digit. 



Colordthm. — I'niform dull olive-green above, lighter and more yel- 

 lowish ]>elow. 



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



This genus comes nearest, apparently, to P'traiKjd, from which it 

 diti'ers chiefly in its more rounded wing, shorter, more rounded tail, 

 and dull coloration of the adult male. 



KEY TO THE STECIKS OP CM LOKOTHKACPIS. 



((. Siii)raloral streak ami ()rl)ital riiitr yellow. (Isthniu.s of Panama to Ecuador.} 



Chlorothraupis olivacea, adults ( ]>. ir)4) 



(w. No yellow on sides of head. (Costa llica to I'eru.) 



Chlorothraupis carmioli, adults (ji. ir)5) 



CHLOROTHRAUPIS OLIVACEUS (Cassin). 

 YELLOW-BROWED TANAGER. 



Adultly {sexes' alil\>f). — Above plain bright olive-green. l)ecoming 

 darker on j)ileum; anterior margin of forehead, supraloral line, and 

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

 like liindneck. becoming somewhat dusk}'' 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 vellow medially, olive- 



