406 BULLETIN 50, UNITED STATES NATIONAL MUSEUM, 
Pyrrhophaena® CaBanis and Heine, Mus. Hein., iii, March, 1860, 35. (Type, 
Orthorhynchus amazilia Lesson.) 
Eranna> Heine, Journ. fiir Orn., xi, May, 1863, 187. (Type, Ornismya cinna- 
momea Lesson.) 
Myletes Mutsant and Verruavx, Hist. Nat. Ois.-Mouch., i, livr. 4, 1874, 284. 
(Type, Trochilus yucatanensis Cabot.) 
Cyanomyia Bonaparte, Rev. et Mag. de Zool., May, 1854, 254. (Type, as desig- 
nated by Gray, 1855, ‘‘ Trochilus quadricolor Vieillot,” i. e., T. verticalis 
Lichtenstein.) 
Uranomitra ReicHensacs, Journ. fiir Orn., 1853, Extraheft, 1854, Aufz. der 
Colibr., 10. (Type, as fixed by Gray, 1855, ‘‘ Trochilus quadricolor Vieillot,”’ 
i.e., J. verticalis Lichtenstein.) 
Medium-sized Trochilide (length about 95-110 mm.), with the 
straight or very faintly decurved stout bill much broader than deep, 
longer than head, distinctly widened basally; nasal operculum thick 
or tumid, with more than anterior half exposed; tail nearly truncated 
to slightly double-rounded or emarginate, and tail rufous-chestnut, 
olive-bronzy, or dull greenish bronze, darker subterminally. 
Bill decidedly longer than head (more than one-third but much 
less than one-half as long as wing), straight or very faintly decurved, 
stout, much broader than deep, abruptly widened basally; nasal 
operculum rather thick or tumid, exposed for much the greater part; 
wing normal; tail between one-half and two-thirds as long as wing, 
nearly truncate, slightly double-rounded, or emarginate; tarsi 
feathered; outer toe nearly as long as middle toe, the inner decidedly 
shorter. 
Coloration.—Above metallic green, bronze-green, or bronzy, the 
pileum sometimes violet-blue; tail rufous-chestnut, olive-bronzy, or 
dark bronze-greenish; under parts varying from mostly green, with 
cinnamon-rufous or white abdomen to wholly cinnamon-rufous or 
entirely white. Sexes alike. 
Range.—Northern Mexico to Peru. (Twenty-three species.) 
I am not able to give a better diagnosis of this genus for the reason 
that its limits are very indefinite, and its relations to Agyrtria and 
Saucerottia uncertain. Either the three so-called genera must be 
combined into one, or each of them must be further restricted and a 
considerable number of genera recognized before their definition can 
be made more precise. Even as here restricted I have been obliged 
to place in Amizilis not only certain species formerly referred to 
Uranomitra Reichenbach (e. g. U. violiceps and U. viridifrons), in this 
following Hartert, but also two species of Agyrtria (A. tephrocephala 
and A. maculicauda), which, so far as I am able to see, while agreeing 
with true Agyrtria in coloration, at the same time agree minutely in 
shape of the bill and nasal operculi with typical Amizilis. In short, 
a “Von zuppéc (réthlich) und daévw (leuchten, glinzen).’”? (Cabanis and Heine.) 
b “Von épavvoc (lieblich, anmuthig).”” (Heine.) 
