. E . or Ze rang , | tv - n P Fey : viridis d

~ enscriptus ; as 5 ee :
Pter. ee ; is ... with the bill yellow, black on its culmen at its tip and base, blotched
Pter. Humboldta ; J

th black at its serratures, and with the under mandible black.
w é

’s, N inwardt’s Aracaris belong to section F, with the followip
Langsdorf¥'s, Natterer’s, and Reinwardt’s Arac g ;
distinctive characters : , | | |
Pter. Nattereri; with the bill red, marked at the base of each mandible with a large black
spot, and having the culmen and five or six blotches along the edge of the upper
spot, < gt
mandible also black. |
Pter. Reinwardti ; with the bill reddish at the base, with several black spots near the
cutting edge of the upper mandible, and with the culmen and terminal half blackish
§ eds
brown. | |
Pter. Langsdorffii; with the bill throughout nearly black, becoming slightly grey towards

its base.

Pter. pavoninus, Derhianus, and hematopygus will range in the seventh or last section, G,
and are thus characterized :

Pter. pavoninus; with the under tail-coverts and tips of the tail-feathers brown, and the

lower mandible and base and cutting edge of the upper black.
Pter. Derbianus ; with the under surface green throughout, and the ups of the two inter-
mediate tail-feathers chestnut.

Pter. hematopygus; with the under surface green throughout, and the upper tail-coverts
blood red.

As all the species comprised in this latter section appear to possess characters sufficiently

culiar genus, I propose to regard them in that light,
and to give them the generic title of Aulacorhynchus,
Bill comparatively short, furrowed on the sl

under mandible extending obliquely |

distinct to warrant their separation as a pe
with the following characters :

des ; culmen broad and flattened ; base of the
veyond the line of the eve.
fourth quill-feather the longest, the fifth

Tail comparatively short

Wings short and round, the
, sixth, and seventh being nearly of tl
and less decidedly graduated th
group are characterized by

1e same length.

an in Pteroglossus—The whole of this

a uniform green plumage, the feathers of which are loose and de-
composed in their texture.