LNT hO DU Git ON. XCVil

short and truncate; farsi clothed; feet rather small; hind toe shorter than the middle toe; nails short and
curved.

Although I have placed this genus next to Cyanomyia, I consider that it has some relationship to the Amazilie.

319. HemistriuBon Ocat, Gould.
Amazilia Ocai, Gould . : f : : : : :
Pyrrhophaena Ocai, Cab. et Hein. Mus. Hein. Theil iii. p. 36, note.
Habitat. Mexico.
This beautiful species was discovered by M. Rafael Montes de Oca at Xalapa.

Vol. V. Pl. 289.

In this genus I provisionally place the Trochilus Norrisi, of which a single specimen exists in the Loddigesian
collection, but unfortunately is so situated that I could not subject it to so careful an examination as I could have

desired.

320. Hemistitpon Norrist.
Trochilus Norrisit, Bourc. Proc. of Zool. Soc. part xv. p. 47.
Polytmus Norrist, Gray and Mitch. Gen. of Birds, vol. i. p. 108, Polytmus, sp. 71.
Amazilia Norrisii, Reichenb. Aufz. der Col. p. 10; Id. Troch. Enum. p. 8.
Amazilia norrisi, Bonap. Rev. et Mag. de Zool. 1854, p. 254.
Pyrrhophaena Norrisi, Cab. et Hein. Mus. Hein. Theil iii. p. 36, note.

Habitat. Bolanos in Central Mexico.

At present only one species is known of the
Genus Leucierus, Bonap. ;

but I am inclined to believe that other birds of this form exist ; indeed I have all but positive evidence that such is
the case, in a specimen killed by M. Warszewicz in Peru, which for the present I decline describing, as it may

possibly be only a female of some unknown species, the male of which will be differently coloured.

321. LeuCIPPUS CHIONOGASTER . : , : ; : : : ‘ ‘ : ; Vol. V. Pl. 290.
Leucippus chionogaster, Cab. et Hein. Mus. Hein. Theil iii. p. 31.
Habitat. Peru and Bolivia.

Genus Leucocuioris, Reichend.

This is another form of which a single species only has yet been discovered.

322. LEUCOCHLORIS ALBICOLLIS . a ; : i : : : j 3 Hietoak Vols Va Bi, 29%:

Trochilus vulgaris, Wied, Beitr. iv. p. 72.

Leucippus albicollis, Reichenb. Troch. Enum. p. 8, pl. 782. figs. 4818-19.
Agyrtria albicollis, Cab. et Hein. Mus. Hein. Theil iii. p. 32.

Thaumatias albicollis, Burm. Th. Bras. tom. ii. p. 342.

Habitat. Brazil; and Tucuman, according to Dr. Burmeister.

 

This is a very pretty species, distinguished by its green and white plumage. The sexes are alike in external

appearance.

The genus Thaumatias, as proposed by Bonaparte and adopted by me, comprises many species respecting
which much confusion exists, especially with regard to the names applied to them by the older authors; some
confusion also occurs with respect to the species I have called Thaumatias Linnei, which I fear cannot be satis-
factorily unravelled. If it should be decided that it is not the bird Bonaparte intended, I trust it will be allowed
to stand as the “ Thaumatias Linnei, Gould, nec Bonap.” The other synonyms may or may not be applicable to it,
but they are given on the authority of M. Bourcier of Paris. This is another of those instances which unfortunately
occur too frequently for the advantage of science; I mean the impossibility of determining the species intended in

the curt descriptions left us by Gmelin and others of Tobaci or Tobagensis, Ourissia, cum multis aliis.

Genus Tuaumarias, Bonap.

The species of this form are natives of Brazil, the banks of the Rivers Amazon and Napo, the Guianas, the

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