122 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



d. Smaller (wing averaging 366.7 in male, 373 in female; culmen averaging 56.4 

 in male, 56.5 in female). (Colombia to Peru and Bolivia.) 



Ara militaris militaris (extralimital).« 

 dd. Larger (wing averaging 385.5 in male, 375.3 in female; culmen averaging 

 62.7 in male, 59.3 in female). (Western Mexico.) 



Ara militaris mexicana. (p. 132). 

 cc. Bill larger (culmen 68-75); rump and tail-coverta pale turquoise or nile blue; 

 general green color lighter, more yellowish. (Southern Nicaragua to west- 

 ern Ecuador.) Ara ambigua (p. 134). 



bb. Rump and tail-coverta green; under wing-coverts mostly red or orange-yellow; 



smaller (wing less than 250 mm.).^ 



c. Head green (tinged with blue on pileum), the forehead, narrowly, dark brownish 



red; under wing-coverts mostly red; tail green, blue, and dull brownish red, 



its under surface dull red. (Panama to the Guianas, Amazon Valley, and 



Bolivia.) Ara severa (p. 138). 



cc. Head (all round) red; under wing-coverts orange-yellow; tail red and blue 

 above, orange-yellow on under surface. (Jamaica; extinct.) 



Ara erythrocepliala (p. 140). 



ARA ARARAUNA (Linnaeus). 



BLTTE AND YELLOW MACAW. 



Adults (sexes alike). — General color of upper parts turquoise blue 

 to deep nile blue, passing into apple green or oil green on forehead 

 and sides of crown and occiput, the tail usually bluer (less greenish), 

 nearer cerulean blue; remiges dull cobalt blue; under parts and under 

 wing-coverts rich orange-yellow or yellow-orange, '^ sometimes slightly 

 lighter (nearly cadmium yellow) anteriorly; under tail-coverts dull 

 nile blue to dull turquoise blue ; under surface of rectrices and remiges 

 chrome yellow, changing (with different inclmation to light) to oliva- 

 ceous ; baie gular and malar area bordered posteriorly by a broad band 

 of dull olive-blackish, the feathered lines on loral, suborbital, and auric- 

 ular regions the same color; bill, legs, and feet dusky (in dried skins) ; 

 iris light yellow to grayish yellow. 



Immature. — Essentiall}^ like adults, but some of the wing-coverts 

 and upper tail-coverts pale brownish gray with a faintly defined 



a [Psittacus] militaris Linnaeus, Syst. Nat., ed. 12, i, 1766, 139 (no locality mentioned 

 and no references given; but Ohubb, in Birds S. Am., i, Dec, 1912, 80, suggests 

 Colombia as type locality). — Psittacus militaris Bechstein, Lathams Uebers. Vog., i, 

 1793, 177, 697; Kuhl, Consp. Psitt., 1820, 17; Hahn, Orn. Atl., Papag., 1834, 26, 

 pi. 11; Brehm, Mon. Papag., 1842, pi. 5. — Ara militaris Perry, Arcana, 1810, pi. 20 

 and text; Salvadori, Cat. Birds Brit. Mua., xx, 1891, 158, part (Bogota, Colombia; 

 "South America"). — Macrocercus militaris Vieillot, Nouv. Diet. d'Hist. Nat., ii, 

 1816, 261 ("Guiana"); Selby, Naturalists' Libr., Parrots, 1836, 87, part, pi. 5.— 

 Macrocercus [Aracanga] militaris Bonaparte, Rev. et Mag. de Zool., 1854, 119. — 

 S[ittace\ militaris Wagler, Mon. Psitt., 1832, 668, 723, part.— iSifiace militaris Finsch, 

 Die Papag., i, 1867, 396, part; Reichenow, Journ. fiir Orn., 1881, 268, part (monogr.); 

 Consp. Psitt., 1882, 156, part; Vogelbild., 1878, pi. 1, fig. 1. 



& Dimensions of A. erythrocephala unknown, however. 



c Exactly the "orange" of the author's "Nomenclature of Colors" (1886). 



