BIRDS OP NORTH AND MIDDLE AMERICA 37 



parts). — Beristain and Laurencio, Mem. y Rev. Soc. Gent. "Antonio Alzate," 

 vii, 1894, 220 (Tehuantepec, Mexico). 



Ortalis poKocephala Fem{Asi-Perez, Proc. U. S. Nat. Mus., ix, 1886, 17S (Chachapa, 

 Puebla). — Ogilvie-Grant, Cat. Birds Brit. Jilus., xxii, 1893, Sll (Tehuantepec 

 and Salina Cruz, Oaxaca). — Salvin and Godman, Biol. Centr.-Amer., Aves, 

 iii, 1902, 279 (Real Arriba, Mexico; Rio de la Armeria and Rio Tupila, Colima; 

 Chacliapa, Puebla ; Rio Grande, Tapana, Santa Efigenia, Barrio, ToruUo, Ta- 

 pantapec, and Salina Cruz, Oaxaca; Tonala, Chiapas). — Bangs and Peters, 

 Bull. Mus. Comp. Zool., Ixviii, 1928, 386 (Chivelas, Oaxaca, Mexico). — Mendi- 

 zabal. Rev. Soc. Mex. Hist. Nat, i, No. 3, 1940, 180, in text (Mexico).— 

 Petrides, Trans. 7th North Amer. Wildlife Conf., 1942, 311, in text (age in- 

 dicators in plumage). 



0[rtalis] poliocephala Ridcway, Man. North Amer. Birds, 1887, 209. — Reichenow, 

 Die Vogel, i, 1913, 277. 



[Ortalis] poliocephala Sharpe, Hand-list, i, 1899, 17. 



Ortalis vetula poliocephala Peters, Check-list Birds of World, ii, 1934, 19. — Hell- 

 MAYR and CONOVER, Cat. Birds Amer. i. No. 1, 1942, 168 (syn. ; distr.). — Blake 

 and Hanson, Publ. Field Mus. Nat. Hist, zool. ser., xxii, 1942, 527 (Michoacan; 

 Cerro de Tancitaro; spec). 



Ortalida leucogastra (not Penelope leucogastra Gould) Sclater, Proc. Zool. Soc. 

 London, 1859, 391 (Rio Grande, Oaxaca; crit.). 



Ortalis poliocephala subsp. tongicauda Lampe, Jahrb. Nassau Ver. Natur., lix, 1906, 

 232 ("Mexico"; type in Wiesbaden Mus.). 



Ortalida plmnheiceps (not plumbiceps Gray) Beristain and Laurencio, Mem. y Rev. 

 Soc. Cient. "Antonio Alzate," vii, 1894, 220 (Tehuantepec, Mexico). 



ORTALIS VETULA LEUCOGASTRA (Gould) 



White-bellied Chachalaca 



Adult (sexes alike). — Similar to the corresponding stage of Ortalis 

 vetula poliocephala in the whiteness of the abdomen and posterior under- 

 parts, but with less ochraceous wash on the under tail coverts, flanks, 

 thighs, and sides, and almost none on the abdomen ; very much smaller in 

 all dimensions ; upper parts of body darker — Dresden brown to sepia, and 

 the crown washed with mummy brown; rectrices as in Ortalis vetula 

 vetula, with a well-developed greenish sheen and white tips. 



Juvenal. — None seen. 



Downy yoiing. — None seen. 



Adult male.— Wing 207-220 (215.6) ; tail 197-212 (202.6) ; exposed 

 culmen 27 (27) ; tarsus 52-55 (53.6) ; middle toe without claw 45—16 

 (45.6 mm.). 35 



Adult jemale.—Wing 200-203 ; tail 195-197 ; exposed culmen 24-25 ; 

 tarsus 50-54; middle toe without claw 43 (43 mm.).^^ 



Range. — Resident from southwestern Chiapas (Huehuetan) ; Pacific 

 lowlands of western Guatemala (Naranjo, Escuintla, Retalhuleu, Costa 

 Grande, San Jose, Hacienda California, Finca Cipres, and Espina) ; the 



' Three specimens from Chiapas. 

 ■ Twro specimens from Chiapas. 



663008° — 46 4 



