BIRDS OF NORTH AND MIDDLE AMERICA 31 



cc. Head and neck slate-gray. 



d. Abdomen white, the under tail coverts pale brownish gray (Caribbean 



slope of Darien) Ortalis garrula mira (p. 45) 



dd. Abdomen pale fulvescent. 



e. Tail shorter, usually under 230 mm. (eastern Nicaragua to Panama). 



Ortalis garrula cinereiceps (p. 42) 

 ee. Tail longer, over 230 mm. (Montijo Bay, Veraguas). 



Ortalis garrula oil vacea (p. 45) 



ORTALIS VETULA MCCALLI (Baird) 



Northern Chachalaca 



Adult (sexes alike). — Forehead, crown, and occiput dull brownish 

 chaetura black, the individual feathers somewhat paler, more grayish, 

 medially ; hindneck, scapulars, interscapulars, upper wing coverts, sec- 

 ondaries, back, rump, and upper tail coverts deep olive to dark greenish 

 olive, the hindneck and interscapulars averaging slightly more brownish 

 olive ; primaries olive-brown, externally edged with deep olive ; rectrices 

 dark greenish olive with an oil-green sheen, the median pair indistinctly 

 tipped with pale, ashy huffy brown, the other pairs with white tips about 

 15-20 mm. wide, the white tips joined to the greenish part of the feather 

 by a narrow, grayish-brown band ; lores and sides of head largely nude 

 but lower cheeks with some black hairlike feathers ; auriculars and sides 

 of upper throat, center and sides of lower throat, and the upper breast deep 

 olive, each feather with an indistinctly defined median streak of dark 

 olive-buff; a wide band of black hairlike feathers extending from chin 

 along the middle of the upper throat ; sides of upper throat bare ; lower 

 breast paler and washed with fulvescent ; abdomen, sides, and flanks pale 

 fulvous, palest on the middle abdomen; the thighs, lower abdomen, and 

 under tail coverts darker — isabelline buffy brown; bare areas on upper 

 throat grayish flesh color, alike in both sexes except in spring when the 

 male has these patches red ; iris light brown ; bill, tarsi, and toes light 

 horn bluish. 



Juvenal (sexes alike). — In a general way similar to the adult but the 

 hindneck, scapulars, interscapulars, upper wing coverts, secondaries, 

 back, rump, and upper tail coverts Saccardo's umber instead of deep olive, 

 the center of the back and rump indistinctly barred with ashy buck- 

 thorn brown^^ ; remiges also Saccardo's umber, faintly tipped and mottled 



and Santa Marta, Colombia) ; Todd and Carriker, Ann. Carnegie Mus., xiv, 1922, 

 171 (Donjaca, Mamatoco, Fundacion, and Trojas de Cataca, Santa Marta, Colombia; 

 crit.). — Ortalis garrula garrula Peters, Check-list Birds World, ii, 1934, 20; Hell- 

 mayr and Conover, Cat. Birds Amer., i. No. 1, 1942, 178. 



"' According to Bent, U. S. Nat. Mus. Bull. 162, 1932, 350, the upper wing coverts 

 are barred with cinnamon-buff in this plumage. This appears to be a variable 

 character, as I have not found it in all the juvenal birds examined in the present 

 connection. 



