SELEXIDERA.— ATJLACOEHAMPH UB. 559 



The first specimen of this fine species was sent to Cassin by Mr. Mitchell from 

 Cocuyos de Veragua i, and soon afterwards a pair came into the same writer's hands from 

 the Darien Exploring Expedition under Lieut. Michler^. The latter were procured 

 at the falls of the Eio Truando. Since then the species has been gradually traced 

 northwards through the Isthmus of Panama to Costa Rica and Eastern Nicaragua, 

 where Belt found it during his stay at Chontales, a specimen being included in his 

 collection of bird-skins. Mr. Eichardson has also recently sent us specimens from the 

 same district. 



Little is on record concerning this species ; M. Boucard says he found it at Naranjo 

 in Costa Rica in small flocks, living chiefly on fruit ^o. 



AULACORHAMPHUS. 



Aulacorhamphus, Gould, P. Z. S. 1834, p. 147 ; Scl. Cat. Birds Brit. Mus. xix. p. 153. 



Aulacorhamphiis, again, is a genus of very similar structure to Pteroglvssus and its 

 allies, but the common character of the green plumage of all the species makes the group 

 a very homogeneous one. The bill is smaller in proportion than in the other genera of 

 RhamphastidfB, and the base of the culmen rather more elevated ; otherwise there is 

 not much structural difference. Aulacorhamphus also has the peculiarity of being an 

 upland genus, all the species belonging to the thick forests which cover many tropical 

 mountains up to a height of 9000 or 10,000 feet. 



Three of the fourteen known species are found in Mexico and Central America. One 

 of them is peculiar to South-western Mexico, one to the eastern mountain-ranges 

 of the same country, and thence southwards to Northern Nicaragua, and the third 

 to the mountains of Costa Rica and the State of Panama. The southern species are 

 found at various stations throughout the Andes from Colombia to Bolivia and in the 

 higher mountains of Venezuela and Guiana. 



1. Aulacorhamphus prasinus. 



Pteroglossus prasinus, Licht. in Mus. Berol. ' ; Gould, P. Z. S. 1834, p. 78 ' ; Men. Rhamph. t. 29 \ 



Aulacorhamphus prasinus, Bp. Consp. Av. i. p. 96*; Gould, Mon. Rhamph. ed. 3, t. 47'; Scl. 



P. Z. S. 1856, p. 308 " ; 1859, p. 368 ' ; 1864, p. 177 ' ; Cat. Birds Brit. Mus. xix. p. 156 ' ; 



Scl. & Salv. Ibis, 1859, p. 135 '°; P. Z. S. 1870, p. 837"; Sumichrast, La Nat. v. p. 239"; 



Ferrari-Perez, Pr. U. S. Nat. Mus. ix. p. 163"; Salv. & Godm. Ibis, 1892, p. 327 ". 



Pteroglossus pavoninus , Wagl. Isis, 1829, p. 507 '^ 



Supra viridis, capite vix obscuriore, uropygio Istiore : subtus dilutior, pectore vix cserulesoentiore, gula alba, 

 tectricibus subalaribus castaneis ; cauda supra viride ad apicem cserulescente, subtus nigra, rectricibus 

 omnibus castaueo terminatis ; rostro virideseenti-luteo, oulmine basi et macula infra nares confluente 

 sanguineo-nigris, tom'ia quoque hujus coloris ; mandibula nigra; oculorum ambitu castaneo ; pedibus 

 plumbeis. Long, tota circa 14-0, alee 5-0, caud» 4-5, rostri a rictu 3-5, tarsi 1-3. (Descr. maris ex 

 Orizaba, Mexico. Mus. nostr.) 

 5 mari similis, sed minor, rostro minore. 



