I N T RODUCTIO N. 
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The next section in point of affinity comprises the beautiful Amazonian group of Banded Araparis, 
figured under the names of Pteroglossus Beauharndmi, Pt. Azarce, Pt. Jicwirostris, Pt. Mar ice, Pt. bitor- 
quatus and Pt. Sturmi , and for 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. 
The fourth section, for which I have proposed the generic appellation of Selenidera, and the trivial one 
ofToucanets, is exceedingly well-marked; all its members are of small size when compared with the true 
Araparis, have shorter and harder bills; shorter and less graduated tails; and are, moreover, distinguished 
by a crescentic mark of yellow at the back of the neck ; by brilliant orange and yellow car-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 Seknidcne ; a thick but lax 
plumage; and are not banded on the under surface like the Araparis. For this group I have proposed 
the generic name of Andigena. 
The sixth and last division, constituting my genus Aulacorhjnclms , altered by Mr. G. 11. 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 Linnaeus’ genus 
RAMPHASTOS, 
WITH THE FOLLOWING CHARACTERS 
Rostrum maximum, tenue, culmine cultrato et versus apicem incurvo; basi margine incrassato, maxillae angulo 
frontali, transversim subtruncato, tomia inaequaliter serrata; nates frontales, pone maxillae basin sitae ; orlitce 
nudae ; lingua mediocris, angusta, pennacea; alee subelongatae, concavae; remigibus primi's et secundariis ad 
apices in spatham angustam eductis; primariis sexta et septima coaequalibus, et longitudine praestantibus; 
cauda eequalis ; pedes scansorii; digiti externi intends longiores ; acropodia scutulata. 
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 
