BIRDS OF NORTH AND MIDDLE AMERICA. 431 
maries attenuated or otherwise modified); tail slightly more than 
half to two-thirds as long as wing, shallowly to deeply emarginate, 
the lateral rectrices sometimes slightly narrowed terminally; tarsi 
feathered; outer toe nearly as long as middle toe, the inner decidedly 
shorter. 
Coloration—Above metallic green or bronze-green, the pileum 
usually darker and duller, but sometimes brilliant metallic green or 
blue; tail olive-bronzy, sometimes with an indistinct subterminal 
band of darker; under parts, except sides, varying from wholly white 
to almost entirely metallic green, but always with some white on 
abdomen. Sexes alike. 
Range.—Southern Mexico to Peru, Bolivia, Brazil, and Cayenne. 
(About twenty-five species, mostly South American.) 
KEY TO THE SPECIES OF AGYRTRIA. 
a. Under parts mostly white. 
b. Pileum dull metallic green or bronze; maxilla pale with dusky tip; sides and 
flanks white slightly mixed on outer portion with metallic green; under tail- 
coverts white. (Southeastern Mexico to Costa Rica.) 
Agyrtria candida (p. 432). 
bb. Pileum brilliant metallic green (emerald green); mandible black or dusky; 
sides and flanks metallic green; under tail-coverts light brownish gray mar- 
gined with white. (Trinid4d and Venezuela.) 
Agyrtria chionopectus (extralimital).¢ 
aa. Under parts mostly metallic green. 
b. Rectrices (except middle pair) bronze crossed by a subterminal band of dusky 
and tipped with grayish; throat and chest metallic bluish green changing to 
greenish blue. (Honduras?)..............----------- Agyrtria luciz (p. 434). 
bb. Rectrices (except middle pair) mostly blackish; throat and chest metallic 
yellowish green. (Venezuela and Trinid4d to lower Amazon Valley.) 
Agyrtria viridissima (extralimital).d 
a Thaumatias chionopectus Gould, Mon. Troch., v, Sept., 1859, pl. 293 (Trinidad).— 
Polytmus chionopectus Léotaud, Ois. Trinidad, 1866, 140.—Leucolia chionopectus 
Mulsant and Verreaux, Classif. Troch., 1866, 31.—Al[gyrtria] niveipectus Cabanis and 
Heine, Mus. Hein., iii, 1860, 33, footnote (new name for T. chionopectus).—Agyrtria 
nivetpectus Elliot, Classif. and Synop. Troch., 1879, 202; Salvin, Cat. Birds Brit. 
Mus., xvi, 1892, 180.—A[gyrtria] chionopectus (typica) Hartert, Das Tierreich, Troch., 
1900, 42.—Leucolia niveipectus Mulsant and Verreaux, Hist. Nat. Ois.-Mouch., i, 
1874, 227; iv, 1878, 173. 
In the collection of the Museum of Comparative Zoology are four specimens of this 
species labeled ‘‘Grenada, W. I. Peter Gellineau.’”’ As these are of the well-known 
“make” of Trinid4d ‘‘trade” skins, and the species has not been recorded from 
Grenada, I conclude that a wrong locality has been assigned the specimens in question. 
b (?)Trochilus maculatus Vieillot, Ois. Dor., i, 1801, 87, 117, pl. 44; Nouv. Dict. 
d’ Hist. Nat., vii, 1817, 361.— Agyrtria maculata Maynard, Birds E. Maas., 1870, 128 (Cam- 
bridge, Massachusetts).—Ornismya viridissima Lesson, Hist. Nat. Ois.-Mouch., 1829, 
pp. xxxiv, 207, pl. 75 (‘‘Brésil”).—Trochilus viridissimus Lesson, Ind. Gen. et Synop. 
Troch., 1832, p. xxvi.—(?) Thawmatias viridissimus Burmeister, Syst. Ueb. Th. Bras., 
ii, 1856, 344.—Agyrtria viridissima Salvin, Cat. Birds Brit. Mus., xvi, 1892, 186.— 
Algyrtria] viridissima Hartert, Das Tierreich, Troch., 1900, 45.—{Chlorestes] mal- 
vina Reichenbach, Aufz. der Colibr., 1854, 7; Troch. Enum., 1855, 4, pl. 696, figs. 
4550, 4551.—A[gyrtria] malvinae Cabanis and Heine, Mus. Hein., iii, 1860, 33, foot- 
note.—[Chiorestes] 8. Saucerottia viridipectus Reichenbach, Aufz. der Colibr., 1854, 
