280 CRACIDZ. 
Ortalis poliocephala, Ferrari-Perez, Pr. U.S. Nat. Mus. ix. p- 175°; Grant, Cat. Birds Brit. Mus. 
xxil. p. 511°; Handb. Game-Birds, ii. p. 244". 
Ortalida leucogastra, Scl. (nec Gould), P. Z. S. 1859, p. 391. 
Supra grisescenti-olivacea ; pileo et collo undique saturate cinereis; prepectore grisescenti-olivaceo ; pectore 
et abdomine albis; subcaudalibus pallide ferrugineis; reciricibus fulvo terminatis: rostro plumbeo; 
pedibus cineraceis; iride coryllina, orbite et gula nudis coccineis. Long. tota circa 25:0, ale 9°6, 
caude 10°8, tarsi 2:9. 
2 ad. mari similis. (Descr. maris et femine ex Tehuantepec. Mus. nostr.) 
Hab. Muxico'? (le Strange*), Real Arriba (Deppe*), Rio Armeria and Rio Tupila 
(Xantus *°), Chachapa, Puebla (Ferrari-Perez *), Rio Grande, Oaxaca (Boucard 1), 
Tapana, near Santa Efigenia, Barrio, Tehuantepec city, Torullo, ie seme 
Tonala (Suméichrast ®"), Salina Cruz (Richardson ®). 
O. poliocephala belongs to the section of the genus including the species with white 
or buff tips to the tail-feathers, and is further distinguished by the rufous-buff under 
tail-coverts. Although nearly allied to O. vetula, it is easily recognized from that 
species by its larger size and dark grey head and neck. 
The present species is said by Sumichrast? to be very common in the Pacific coast 
provinces of Mexico, where it is known as the “Chachalaca.” Nothing has been 
published respecting its habits. 
3. Ortalis vetula. 
Penelope vetula, Wagl. Isis, 1830, p. 1112'. 
Orialida vetula, Wagl. Isis, 1832, p. 12277; Moore, P. Z. S. 1859, p. 62°; Scl. P.Z.S. 1859, 
pp. 869 *, 891°; Scl. & Salv. Ibis, 1859, p. 224°; P. Z. S. 1869, p- 364" 1870, pp. 538 *, 
838 ° Lier: Ann. Lyc. N. Y. v. p. 116"; Bull. U. S. Nat. Mus, no. 4, p. 45"; 
Rualbr: This, 1860, p. 311"; Sumichr. La Nat. ii. p. 837°; v. p. 229%. 
Ortalis vetula, Boucard, P. Z. 8. 1888, p. 460"; Salv. Ibis, 1889, p. 378°; 1890, p. 89"; 
Grant, Cat. Birds Brit. Mus. xxii. p. 512; Handb. Game-Birds, ii. p. 245. 
Penelope garrula, Licht. (nec Humb.), Preis-Verz. Mex. Vég. p. 3%; Cab. J. f. Orn. 1863, p. 58”. 
Ortalida polocephala, Scl. (nee Wag).), P. Z. S. 1856, p. 310”; Cassin, Illustr. p. 267, t. 44, 
Ortalida maccall, Baird, B. N. Amer. p. 611%; Dugés, a, Nat. i. p. 141”; Lawr. Ann. Lye. 
N.Y: 1x. p..209 ™. 
Orialts vetula maccalli, Ferrari-Perez, Pr. U. S. Nat. Mus. ix. p. 176"; Herrera, La Nat. (2) i 
p. 278”; Bendire, Life Hist. N. Amer. Birds, p. 119, t. 3. de. 16”; Drury, Journ. 
Cincinnati Soc. xviii. p. 201 *. 
Ortalida plumbiceps, Gray, List Gallinze Brit. Mus. p. 11. 
Ortalida ruficrissa, Scl. & Salv. P. Z. S. 1870, p. 588 *.. 
Ortalis vetula pallidiventris, Ridgw. Man. N. Amer. Birds, p. 209°; Chapm. Bull. Amer. Mus. viii. 
p. 288, 
O. polocephale similis, sed minor, pileo colloque minus cinerascentibus ; gula nuda et iride coccineis. Long. 
tota circa 20:0, ale 8:0, caude 9-6, tarsi 2°5. 
2 mari similis. (Descr, maris et femine ex Vera Cruz. Mus. nostr.) 
