12 BULLETIN 50, UNITED STATES NATIONAL MUSEUM 



KEY TO THE NORTH AND MIDDLE AMERICAN FORMS OF THE GENUS CRAX" 



a. Crest uniform black (male). 



b. A wattle present on each side of his chin Crax alberti (extralimital)" 



bb. No wattles at base of lower mandible. 



c. Plumage of upperparts with a purplish gloss. . . .Crax nigra (extralimital)^ 

 cc. Plumage of upperparts glossed with dull greenish. 



d. Smaller, wings averaging 340 mm Crax rubra griscomi (p. 19) 



dd. Larger, wings averaging 385 mm Crax rubra rubra (p. 13) 



aa. Some white bars in crest (females). 



b. Secondaries uniform black Crax nigra (extralimital) 



bh. Secondaries not uniform black. 



c. Secondaries black with narrow white bars Crax alberti (extralimital) 



cc. Secondaries chestnut, or, if blackish, then widely barred with whitish. 



d. Size smaller, wings averaging 330 mm Crax rubra griscomi (p. 19) 



dd. Size larger, wings averaging 370 mm Crax rubra rubra (p. 13) 



"° Included in the key are two South American species, whose ranges extend near 

 enough to Panama to make them worth considering as potential additions in time 

 to come. 



" Crax alberti Fraser. — Crax alberti Fraser, Proc. Zool. Soc. London, 1850, 246, 

 pis. 27, 28 (locality unknown; coll. Knowsley Menagerie) ; Gray, List Birds Brit. 

 Mus., pt. 5, Gallinae, 1867, 15 ; Sclater and Salvin, Proc. Zool. Soc. London, 1870, 

 517 (monogr. ; Colombia) ; Sclater, Trans. Zool. Soc. London, ix, 1875, 280, pi. 48; 

 Ogilvie-Grant, Cat. Birds Brit. Mus., xxii, 1893, 483 (vicinity of Bogota, Colom- 

 bia) ; Bangs, Proc. Biol. Soc. Washington, xii, 1898, 132 (Santa Marta, Colombia) ; 

 Allen, Bull. Amer. Mus. Nat. Hist., xiii, 1900, 127 (Bonda, Naranjo, and Santa 

 Marta, Colombia) ; Chapman, Bull. Amer. Mus. Nat. Hist., xxxvi, 1917, 194 (west 

 of Honda, Colombia, 2,000 feet) ; Todd and Carriker, Ann. Carnegie Mus., xiv, 

 1922, 176 (Don Diego and San Lorenzo, Santa Marta, Colombia). — Hellmayr and 

 CoNOVER, Cat. Birds Amer., i, No. 1, 1942, 127. — C[ra.r] alberti Reichenbach, Voll. 

 Nat. Tauben, 1861, 136.— [Cm.r] alberti Gray, Hand-list, ii, 1870, 253, No. 9527; 

 Sclater and Salvin, Norn. Av. Neotr., 1873, 135; Sharpe, Hand-list, i, 1899, 15.— Crc^r 

 alberti alberti Peters, Check-list Birds of World, ii, 1934, 11. — (?) Crax mikani, part, 

 Pelzeln, Orn. Bras., 1870, 343 (female). — Crax viridirostris Sclater, Trans. Zool. Soc. 

 London, ix, 1875, 282 ("South America"; type now in coll. Brit. Mus.) ; x, 1879, 544, 

 pi. 92; Proc. Zool. Soc. London, 1876, 463 (Cartagena, Colombia). — Crax annulata 

 Todd, Proc. Biol. Soc. Washington, xxviii, 1915, 170 (Don Diego, Santa Marta, 

 Colombia). 



^ Crax nigra Linnaeus, Syst. Nat., ed. 10, i, 1758, 157 (South America) ; Peters, 

 Check-list Birds of World, ii, 1934, 10 (distr. ; syn.). — [Cra.r] alector Linnaeus, 

 Syst. Nat, ed. 12, i, 1766, 269 ("America Calidiore" ; based on Crax guianensis 

 Brisson, Orn., i, 1725, 298, pi. 29). — Callus indicius Sloane, Jam., ii, 302, pi. 260; 

 Gmelin, Syst. Nat., i, pt. 2, 1788, 735; Latham, Index Orn., ii, 1790, 622; Gray, 

 Hand-list, ii, 1870, 253, No. 9523 ; Sclater and Salvin, Nom. Av. Neotr., 1873, 135 ; 

 Sharpe, Hand-list, i, 1899, 14. — Crax alector Bonnaterre, Tabl. Encycl. Meth., i, 

 1791, 173, pi. 85, fig. 4; Temminck, Pig. et Gallin., iii, 1815, 27, 689; Vieillot, Nouv. 

 Diet. Hist. Nat., xiv, 1817, 584; Gal. Ois., ii, 1825, 6; Lesson, Traite d'Orn., 1831, 

 484; Bennett, Card, and Menag., ii, 1831, 9; Reichenbach, Synop. Av., Columb., ii, 

 1837, pi. 173, fig. 1515 ; Gray, List Birds Brit. Mus., pt. 3, Gallinae, 1844, 20, pt. 5, 

 Gallinae, 1867, 14; Voll. Nat. Tauben, 1861, 148 (crit.) ; Burmeister, Syst. t)bers, 

 Th. Bras., iii, 1856, 344; Pelzeln, Orn. Bras., 1870, 286 (Rio Negro, Rio Vaupe, 



