754 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



its second phalanx wholly adherent to outer toe, its first phalanx 

 entirel}" united to inner toe; outer toe, without claw, reaching; 

 nearly to base of terminal phalanx of middle toe, the inner toe mucii 

 shorter, reaching (without claw) to but little beyond base of sub- 

 terminal phalanx of middle toe; hallux (without claw) as long as 

 inner toe. 



Plumage and coloration. — Contour plumage broad and blended, 

 that of the upper surface, in adult males, compact and glossy, with 

 feathers of pileum rather distinctly outlined; no crest nor frontal 

 tuft. Adult males uniform glossy blue-black aboye, yelyety black 

 beneath, with whole throat (sometimes side of neck also) pure white; 

 adult females olive-green, paler below, with throat more grayish and 

 abdomen more yellowish. 



Nidijication. — (Unknown '() 



Range. — Nicaragua to Guiana. (Two species.) 



KEY TO THE SPECIES AND SUBSPECIES OF CORAPIPO. 



a. Glossy blue-black or dark steel blue, with chin and throat white. (Adult males.) 

 h. \Vhite gular area extending farther backward laterally than medially, the feathers 

 much elongated (forming a conspicuous ruff when erected); under parts of 

 body glossy l)lue-])lack like upper surface. (Corajnpo leucorrhoa.) 

 c. Fifth and sixth primaries longest, the seventh, eighth, and ninth, each suc- 

 cessively, from 3 to 5 mm. shorter than the preceding, the tenth (outermost) 

 "reduced to a small, narrow, lanceolate feather not more than 15 mm. in 

 length." o (Colombia.) 



Corapipo leucorrhoa leucorrhoa, adult male (extralimital)^ 

 cc. Seventh primary longest, tlio iifth alxiut '2 mm. shorter, the eighth about 1 mm. 

 shorter than fifth, the ninth 2 mm. shorter than eighth, the tenth (outermost) 

 12-14 mm. shorter than ninth and not conspicuously narrowed nor lanceo- 

 late. (Panama to Nicaragua. ) . Corapipo leucorrhoa altera, adult male (p. 755) 

 bb. White gular area extending much farther backward medially than laterally 

 (ending in a point on lower foreneck), the feathers not noticeably elongated ; 

 under parts of body velvety black. (Cayenne and British Guiana.) 



Corapipo gutturalis, adult male (extralimital)c 

 aa. Above plain olive-green, beneath similar but paler, becoming yellowish on abdo- 

 men and sometimes grayish or white on throat. (Adult females and young.) 



oHellmayr, Bull. Brit. Orn. Club, xvi, 1906, 85. 



b Pipra leucorrhoa Sclater, Proc. Zool. Soc. Loud., 1863, 63, pi. 10 (Bogota, Colombia; 

 coll. P. L. Sclater); Cat. Birds Brit. Mus., xiv, 1888, 301, part. — C{orapipo] l[eucorrhoa\ 

 leucorrhoa Hellmayr, Bull. Brit. Orn. Club, xvi, no. cxxiv. May 8, 1906, 84, 85, in text. 



c\Piprd\ gutturalis Linnneus, Syst. Nat., ed. 12, i, 1766, 340 (based on Manacus gui- 

 ture albo Brisson, Orn., iv, 444, pi. 36, fig. 1); Sclater, Cat. Birds Brit. Mus., xiv, 

 1888, 301. — C'oropipo] gutturalis Cabanis and Heine, Mus. Hein., ii, 1859, 94. — P[ipra] 

 perspicillata Wagler, Isis, 1830, 935 (locality not given; coll. Paris Mus.). 



J 



