342 AVES. 
All this variety of size and colours can hardly authorise any 
generic distinctions. There are only the 
a 4 
ParoquETs A TROMPE, Vaill. 
Which possess characters sufficiently well marked to claim a 
separation from the others. ‘heir short, square tail, and their 
crest composed ‘of long and narrow feathers, assimilate them to the 
Cockatoos. Their cheeks are naked, as in the Ara, but their enor- 
mous upper mandible, and the very short lower one, which cannot 
be made to close, their cylindrical tongue, terminated by a small 
horny knob, split at the apex, and susceptible of being greatly pro- 
truded from the beak, their legs, naked a little above the heel, and 
finally, their short and flat tarsi on which they often rest in walking, 
distinguish them from all other Parrots. But two species are 
known, both natives of the East Indies. (1) A subgenus might also 
perhaps be made of the . 
Przororus, Illig-—Prrrucnes Incamsgs, Vaill. 
Which have a weaker beak, more elevated tarsi, and straighter 
nails than the other parrots. They walk about on the ground, and 
seek their food among the grass.(2) ad 
There are two African birds, closely allied to ach other, 
and generally placed among the Scansorie, which appear to 
me to have some analogy with the Gallinacee, and especially 
with the Hoccos. ‘ 
They have the tail and wings of the Hoccos, and like them 
perch on trees; the beak is short, and the upper mandible 
gibbous; there is a short membrane between the fore-toes, 
but the external one, it is true, is often directed backwards 
Vaill. 66;—Ps. fringillaceus, Vaill. 71 , or porphyrocephalus, Sh. Misc., 1;—Ps. 
phigy, Vaill. 64;—Ps. aanthopterigius, Spix, XXXIV, 12;—Ps. gregarius, Spix, 
XXXIV, 3, 4. 
(1) Psittacus aterrimus, Gm:, or Ps. gigas, Lath. Edw. 316;—Ps. goliath, Kuhl, 
or l’ Ara noir a trompe, Vaill. per. I, pl. xii and xiii;—L’Ara gris a trompe, Id. Ib. 
pl. ii, is perhaps a variety of the same. The. name of trompe is not exactly cor- 
rect. The tongue is not hollow, and in fact all that can be properly styled tongue 
is the little horny piece which invests the extremity of the cylinder. See Geoff. 
Saint-Hill. Ap. VI, Gal. 4. 
From this subdivision M. Vieillot has made his genus Mrcnocxossvs, Galer. 
pi. 1. 
(2) Ps. formosus, Vaill., I, 32; Sh. Misc., 228; ;—Ps. Reve Zelandiz, ad b3 
Mus. Carls., 28;—Ps. cornutus, Lath., Syn. Supp. I, pl. viii. | 
