IN'T R OD U 6 PLO,

h next section in 0Int f ini is if A o f A
| ¢ 2 ot affinit L(G Aprises Cc az le Gc I
} c J on pt 1ses the b autl ul Ama onlian group O Band d i racaris,

figured under the names . Re Me :
g e names of Pte oglossus Beauhar nasu, Pt. Azare, Pt. Jlavirostris, Pt. Marie, Pt. bitor-

watus and Pt. Sturmi, and for whic reneri pe af
qY Ec hg or which the generic appellation of Beauharnaisius has been proposed by

Prince Charles Lucien Bonaparte. In this section the females very closely assimilate to the males in
colour, but differ in the lighter hue of the throat.

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The fourth section, for which I have proposed the generic appellation of Selenidera, and the trivial one

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of Toucanets, is exceedingly well-marked ; all its members are of small size when compared with the true

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Aracaris, have shorter and harder bills; shorter and less graduated tails ; and are, moreover, distinguished
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by a crescentic mark of yellow at the back of the neck 3 by brilliant orange and yellow ear-coverts ; and by

a great difference in the colouring of the sexes.

The fifth division comprises the Hill Toucans, a group inhabiting the elevated portions of the Andes.

They are all well-proportioned birds, have larger and harder bills than the Selenidere ; a thick but lax
plumage; and are not banded on the under surface like the Aracaris. For this group I have proposed

the generic name of Andigena.

The sixth and last division, constituting my genus Aulacorhynchus, altered by Mr. G. R. Gray to
Aulacoramphus, comprises ten species distinguished by a nearly uniform grass-green style of plumage, the
feathers composing which are long and loose, and by the bill being in some of the species grooved along

the sides. The sexes are alike in colour.

For the true Toucans then I retain Linneeus’ genus

RAMPHASTOS,
WITH THE FOLLOWING CHARACTERS :—

Rostrum maximum, tenue, culmine cultrato et versus apicem incurvo; basi margine incrassato, maxille angulo
frontali, transversim subtruncato, fomia ineequaliter serrata; nares frontales, pone maxille basin site ; orbite
nude ; Jingua mediocris, angusta, pennacea; ale subelongate, concave ; remigibus primis et secundariis ad
apices in spatham angustam eductis; primariis sexta et septima cozqualibus, et longitudine prestantibus ;

cauda eequalis ; pedes scansorii; digiti externi internis longiores ; acropodia scutulata.

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Bill very large, thin; culmen sharp and curved down towards the tip ; thickened on the margin at the base;

serrated on the edges; nostrils placed behind the base of the bill; orbits naked; tongue long, narrow and

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