INTRODUCTION. i 1 Toucans, forming my genus The fifth section contains the Hill Toucans, forming my § ANDIGENA, WITH THE FOLLOWING CHARACTERS :— Rostrum turgidum magnum, attamen minus quam in genere restricto Pter oglossus dicto Ale et ca ud@ ut in genere 4ulacorampho nominato. Ptiluma elongatum, laxum, capillaceum. Bill stout and swollen, but not so large as in the true Pteroglossi; wings and tail very similar to those of Aulaco- ramphus ; general plumage long, loose, and hair-like. It has been found that even the higher ranges of the Andes are not untenanted by the Toucans ; Professor Jameson of Quito informs me that the 4. laminirostris even ascends the sides of Pichincha to an elevation of from six to ten thousand feet. ‘The members of this genus extend all along the Andes and the Cordilleras, from the Caraccas to Bolivia, where Mr. Bridges found a species in the forests of Cocapata, in the department of Cochabamba ; one species, however, the A. Bailloni, appears never to quit the lowlands of Brazil. These Hill Toucans have stout hard ills, are very thickly clothed, and have the under surface generally of a uniform and delicate colour. The species are— 37. Andigena laminirostris : ; . Pl. XXXVII. 38. — hypoglaucus : Pl. XXXVIII. 39. ——— nigrirostris . : ; : Pl. XXXIX. AO cnemiaus : Pl. Xt 41, — — Bailloni E : : Pl. XLI. The sixth and last sect rises bi and last section comprises a series of birds remarkable for some of the species having the sides of their bills deeply grooved ; they form my genus AULACORAMPHUS, WITH THE FOLLOWING CHARACTERS :— hostrum co 1} tly o \ a e ress er Ss tur 1 Y la inferiore 5 mparative DEGVE, l tum c ; oe : 7 5 9 GC d culm n depr essum ; a bud later a suicatum ; anc ib 1 0 lique ultra oculi linea C ale ves iS c ’ wir ? m tenden 3 5 C; 11@ Dreves et To undaté 5 remige C uarta lo oissima qu a; x