Majusculus, coeruleo-glaucus, colorem corporis modo coeruleum, modo glaucum varians, rostro non robusto; barba maxillari cinerascente; alis intus caudaque subtus nigridis.

DESCRIPTIO. Corpus ps. Aodorhynchus duplo minus, coeruleo glaucoque relucens; caput, collum et corpus subtus dilute glauca; cera, genae, regio infra poneque oculos nudae, minus extensae, flavae; barba maculaque auricularis cinerascentes; alae hirundinaceae, saturate coeruleo-glaucae, subtus nigridae, ad marginem axillarem aeque glaucae; cauda supra coeruleo-glauca, subtus nigrida, retricibus mediis subelongatis; rostrum non robustum, dentatum, nigrum, supra medio apiceque albicans; pedes unguesque nigri; oculi albicantes. Mas. Longitudo corporis Iº 41/2´, caudae I0´, caud. Alis longioris 5´, tarsi 1/2´.

Habitat gregarius, rarissimus licet, prope Joazeiro in campis ripariis fluminis St. Francisci, voce tenui insignis, ab Azara pag. 53 „Guacamayo bleu" nominatus, et a Sonnini, nec non a Lathamio cum Anodorhyncho Maximiliani Augusti falso commutatus. Sp. 1.

(Note from website editor (1998): While in the Museum der Naturkunde in 1989 in what was then East Berlin I took a photograph of the specimen there alongside the illustration accompanying Spix’s description. You can see it by clicking here.

Further note (2008): I have been sent photos of the specimen collected by Spix, which is in the natural history museum in Munich. You can see the face by clicking here and the back by clicking here.)