BIRDS OF NORTH AND MIDDLE AMERICA. 735 



Western Panama (Biigaba; Divala; Mina de Chorcha) and sonth- 

 western Costa Rica (Pirris; Pozo Azul de Pirris; Las Trojas). 



Chiromachxris aiirantiaca Salvin, Pnjc. Zool. Soc. Lond., Aug. 1, 1870, 200 

 (Bugaba, Panama; coll. Salvin and Godinan).— Sclater, Cat. Birds Brit. 

 Mus., xiv, 1888, 316 (Bugaba and Mina de Chorcha, Panama).— Salvin and 

 GoDMAN, Biol. Centr.-Am., Aves, ii, 1890, 115, pi. 41, figs. 1, 2. 



[Chiromachxris] aurantiaca Sclater and Salvin, Norn. Av. Neotr., 187:-5, 55. 



Majiacus aurantiaca Bangs. Auk, xviii. 1901, 365 (Divala, Panama;. 



[Manacus] auraniiacus Sharpe, Hand-list, iii, 1901, 158. 



Genus CHIROPRION Bonaparte. 



Chiroprion "Schiff," BoNAPArn'E, Con.-;]). Voluc Aiiiw)d., 1854, 5. iType. Pipra 



pareola Linnaeus.) 

 Cercophxna Bonaparte, Consp. Voluc. Anisod., 1854, (i. (Type. Pipra linearis 



Bonaparte.") 



Rather small Pipridie (wing about 65-80 mm.) with heel joint 

 denuded (except front of tibial portion), second phalanx of middle 

 toe entirely adherent to outer toe and first joint w^holly united to inner 

 toe, the adult males black with pale blue back and ruby red crest. 



Bill very short and stout, its depth at nostrils equal to about two- 

 thirds the distance from nostril to tip of maxilla, or more; culmen 

 distinctly ridged, strongly curved from base, but tip of maxilla very 

 slightly uncinate; gonys about as long as mandibular rami or slightly 

 shorter, nearly as long as distance from nostril to tip of maxilla (quite 

 as long in C. lanceolata) , nearly straight or slightly convex, ascending 

 terminally; basal width of interramal space about equal to its length; 

 maxillary tomium faintly concave, at least anteriorly, distinctly but 

 rather minutely notched subterminally. Nostril at least partly 

 (usually wholly) covered by stiff antrorse plumes of latero-frontal 

 antijB, rather large, roundish, without marginal membrane, except 

 posteriorly. Rictal bristles obvious but (except in C. pareola) not 

 very distinct. Wing rather long, but much rounded, with longest 

 primaries exceeding secondaries by less than length of commissure 

 (by less than length of exposed culmen in C. lanceolata and C. lin- 

 earis); adult males with seventh and eighth {C. pareola) or sixth, 

 seventh, and eighth {C. lanceolata and C. linearis) primaries longest, 

 the tenth slightly shorter than sixth {C. pareola) or shorter than first 

 {C. lanceolata and C. linearis), the three outermost with outer web 

 gradually excised (nearly or quite to the shaft) terminally. Tail 

 about half as long as wing, even or slightly rounded, the rect rices 

 rather narrow, with rounded tip, one species (C. lanceolata) with the 

 middle pair elongated and narrowly pointed, another {C. linearis) 

 with them excessively elongated (several times longer than other 

 rectrices), linear, slightly expanded or subspatulate terminally. Tar- 

 sus much longer than commissure, rather stout, its scutellation exas- 



