INTRODUCTION. Ai

staturam, quam in genere Ramphasto dicto; primariis quartaé, quinta et sexta coqualibus et longissimis ;

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

Bill large, light, serrated on the edges; nostrils above situated in the base of the bill; tongue long, narrow and
feather-like ; wings shorter in proportion than in the genus Ramphastos ; concave ; fourth, fifth and sixth pri-

maries equal, and the longest ; tail graduated ; feet scansorial ; outer toes longer than the inner.

Although very generally dispersed over South America, the Aracaris have a less extended range than

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the true Toucans. Ihave not seen any species from the countries southward of the latitude of Rio de

Janeiro, and no species have been found to the northward of Guatemala. The great countries of

Venezuela, Guiana, the forests of the Amazon generally, and Northern Brazil are the portions of the
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Continent in which the species are found in the greatest abundance.

They are—

15. Pteroglossus Aracari . i 3 : : f f BI oky:
16. —— Wiedi _. : ; : . : ; : Pi x
17. —— pluricinctus . ; é , ; : : PEXVIE
18. ———-——  peecilosternus : : ; ; ; : Pl. XVILL
19, ——————._ castanotis : : : : : : : BE XE
20. ——————__ torquatus : ; : : : : : Pl. XX.
21. —————._ erythropygius : ; : : : ; PIX
a nmbolai ; : : ; : Pl. XXII.
23. ——————__ inscriptus : ; : : : : PE XE
ye : : : : : . E IE xe

Of these ten species seven are normal, and the remaining three somewhat aberrant; in fact the two
lettered Aracaris, P. Humboldti and P. inscriptus, might with propriety be separated into a distinct genus,

and the P. viridis made the type of another.