160 tsittacid^;. 



I. $ ad.sk. Sierra Madre, Tamaulipas Sal vin-Godman Coll. 



[Richardson), 



m. J ad. sk. Mexico. Salvin-Godman Coll. 



n. Ad. sk. Bogota. Sclater Coll. 



o. Skeleton. 

 p. Skeleton. Zool. Society. 



7. Ara ambigua. 



Le Grand Ara militaire, Levaill. Per v. pi. 6 (1801) ; Vieill. N. D. 



ii. p. 261 (1816). 

 Psittacus ambiguus, Beclist. Kurze Ueb. p. 65, n. 5 (1811) ; Kuhl, 



Consp. Psitt. p. 17, n. 7 (1820); Hahn, Orn. Atl, Papag. p. 25, 



t. 9 (1834). 

 Macrocercus ambiguus, Steph. Gen. Zool. xiv. p. 113 (1826). 

 Macrocercus militaris, Selb. Nat. Libr., Parr. p. 86, pi. 5 (part.) 



(1836) ; Burm. Syst. Ueb. ii. p. 163 (note, part.) (1856). 

 Sittace militaris, part., Wagl. Mon. Psitt. p. 668 (1832) ; Finsch, 



Papag. i. p. 396 (part.) (1867) ; ? Lawr. Ann. Lye. N. Y. ix. p. 131 



(Costa Rica) (1868) ; ? Frantz. Journ.f. Orn. 1869, p. 364 (Costa 



Rica). 

 Arara biiffom, Brehm, Mon. d. Papag. p. <>, t. 8 (1842) (e.r Levaill. 



pi. 6). 

 Ara militaris (part.), G. R. Gr. List Psitt. Brit. Mas. p. 28, specim. d 



(1859); Cass. Pr. Ac. Philad. I860, p. 137 (Nercua River); 



Lawr. (nee Linn.) Ann. Lye. N. Y. vii. p. 299 (Panama) (18<>2) ; 



Salv. (nee Linn.) P. Z. S. 1870, p. 213 (Calovevora) ; id. Ibis, 



1871, pp. 87, 88 (part.) ; Sclat. Sf Salv. Nomencl. Av. Neotrop. 



p. Ill, n. 5 (part.) (1873) ; ? Boucard, P. Z. S. 1878, p. 46 (Costa 



Rica) ; ? Sclat. $ Salv. P. Z. S. 1879, p. 538 (Antioquia). 

 Ara militaris s. ambiguus, Cab. Journ. f. Orn. 1862, p. 335 (Costa 



Rica). 

 Macrocercus (Aracanga) ambiguus, Bp. Rev. et Mag. de Zool. 1854, 



p. 149, n. lO ; ? Souance, Rev. et Mag. de Zool. 1856, p. 57. 

 Arara militaris, Schleg. Mia. P.-B. Psittaei, p. 5 (part.) (1864). 

 Ara ambigua, Sclat. P. Z. S. 1867, p. 183 ; Garrocl, ibid. p. 587. 

 Sittace ambigua, Finsch, Papag. ii. 2, p. 943 (1868). 

 Primolius ambiguus, G. R. Gr. Hand-list, ii. p. 144, n. 8080 (1870). 



Very similar to A. militaris', from whicb it differs in being 

 larger, with a much more powerful bill, and in having the olive- 

 green colour much yellower, and the blue colour of the lower back, 

 rump, upper and under tail-coverts paler. Total length 31 inches, 

 wing 16, tail 18, bill 28 to 2-7, tarsus 1*1. 



Hab. Western coast of America, from Veragua to Ecuador. 



I have not the least doubt as to A. ambigua being a different bird 

 from A. militaris. Mr. Sclater, who rightly (P. Z. S. 1867, p. 183) 

 insisted on the two birds being different, was wrong in thinking that 

 the larger one was from Mexico. 



a. (fad.sk. Calovevora, Veragua (E. Aree). Salvin-Godman Coll. 



b. Ad. sk. Balzar Mountains, Ecuador Salvin-Godman Coll. 



March (Illingwortk). 



c. Ad. sk. Guayaquil, Ecuador. G. Barclay [P.]. 



