30 BULLETIN 50. UNITED STATES NATIONAL MUSEUM 



KEY TO THE NORTH AND MIDDLE AMERICAN FORMS 

 OF THE GENUS ORTALIS 



a. With a conspicuous crest on head ; abdomen chestnut-rufous. 

 b. Top of head pale slate-gray (southern Chihuahua to northern Sinaloa). 



Ortalis wagleri griseiceps (p. 49) 

 bb. Top of head dark slate (central and eastern Sinaloa to Durango, Jalisco, and 



Nayarit) Ortalis wagleri wagleri (p. 47) 



aa. No conspicuous crest ; abdomen brownish to whitish. 

 b. Primaries olive-brown. 



c. Larger, wing over 230 mm. (southwestern Mexico). 



Ortalis vetula poliocephala (p. 35) 

 cc. Smaller, wing under 230 mm. 



d. Tips of tail feathers white, not buffy or isabelline. 

 e. Belly pure white (southwestern Chiapas to northern Nicaragua). 



Ortalis vetula leucogastra (p. 37) 

 ee. Belly pale isabelline to dull fulvous (southern Texas to Veracruz). 



Ortalis vetula mccalli (p. 31) 

 dd. Tips of tail feathers isabelline or buffy or chestnut. 



e. Tips of outer tail feathers bright chestnut and very broad (30 mm. or 

 more) (northern Venezuela; introduced into Grenadines, Lesser 



Antilles) Ortalis ruficauda (p. 46) 



ee. Tips of outer tail feathers isabelline or buffy. 



/. Belly dull whitish isabelline (dry parts of Yucatan and adjacent 



Campeche) Ortalis vetula pallidiventris (p. 38) 



//. Belly darker — isabelline to dull fulvous. 

 g. Tips of tail feathers dull buffy brown. 

 h. Tips of tail feathers noticeably bicolored, distinctly rufescent 

 proximally (humid coastal forests from southern British 

 Honduras to eastern Guatemala and northwestern Honduras). 

 Ortalis vetula plumbiceps (p. 40) 

 hh. Tips of tail feathers not noticeably bicolored. 



j. Feathers of upper throat decidedly blackish (Utila Island, 



Honduras) Ortalis vetula deschauenseei (p. 42) 



ii. Feathers of upper throat not decidedly blackish (southeastern 



Mexico) Ortalis vetula vetula (p. 34) 



gg. Tips of tail feathers light grayish isabelline. 



h. Larger; wing averaging 210 mm. (male), 195 mm. (female) 

 (Grand Valley of Interior of Chiapas). 



Ortalis vetula vallicola (p. 40) 

 hh. Smaller; wing averaging 193 (male) ; 185 mm. (female) 

 (Quintana Roo and Peten) . .Ortalis vetula intermedia (p. 39) 

 bb. Primaries chestnut. 



c. Head and neck rusty brovimish. . ..Ortalis garrula garrula (extralimital)" 



"Ortalis garrula garrula (Humboldt). — Phasianus garrulus Humboldt, Obs. de 

 Zool., i, 1811, 4 (Rio Magdalena, Colombia; Caracas, Venezuela). — Plenelope'] 

 garrula Wagler, Isis, 1830, 1111 (Cartagena, "Mexico", i.e., Colombia). — 0[rtalida] 

 garrula Wagler, Isis, 1832, 1227; Reichenbach, Voll. Nat. Tauben, 1861, 144.— 

 Ortalida garrula Gray, List Birds Brit. Mus., iii, Gallinae, 1844, 20; ed. 1867, 12; 

 Sclater and Salvin, Proc. Zool. Soc. London, 1870, 539 (monogr.). — [Ortalida] 

 garrula Reichenbach, Synop. Av., Columb., ii, 1647, pi. 169, fig. 1491 ; Gray, Hand- 

 list, ii, 1870, 252, No. 9506; Sclater and Salvin, Nom. Av. Neotr., 1873, 137.— 

 Ortalis garrula Ogilvie-Grant, Cat. Birds Brit. Mus., xxii, 1893, 515 (Cartagena 



