BIRDS OF NORTH AND MIDDLE AMERICA. 449 
SAUCEROTTIA BERYLLINA BERYLLINA (Lichtenstein). 
BERYLLINE HUMMING BIRD. 
Adult male.—Above bright metallic green or bronze-green, passing 
into duller purplish bronzy on rump, the upper tail-coverts rather 
dull bronzy purple or violet-purple; middle rectrices metallic purplish 
or coppery bronze or bronzy purple, the remaining rectrices chestnut, 
tipped, or broadly margined at tip, with purplish bronze (this some- 
times wanting or obsolete on outermost rectrix); secondaries chest- 
nut, or dull rufous-chestnut, broadly tipped with dusky, the inner- 
most ones (tertials) mostly of the latter color; primaries chestnut or 
dull rufous-chestnut, with terminal portion (extensively) dusky, 
faintly glossed with purplish; malar region, chin, throat, sides of 
neck, chest, breast, sides, flanks, and upper abdomen bright metallic 
green (brighter and more yellowish than grass green), the feathers 
of chin and throat abruptly grayish white, those of under parts of 
body dusky brownish gray, beneath surface; lower abdomen pale 
buffy gray, grayish cinnamon, or isabella color; femoral and lumbar 
tufts white; under tail-coverts pale chestnut broadly edged basally 
and (usually) narrowly margined terminally with white; maxilla 
dull black; mandible pale brownish or dull brownish white (reddish 
in life), dusky at tip; iris dark brown; feet grayish brown or dusky; 
length (skins), 90-103 (97); wing, 52-56.5 (54.7); tail, 30-32 (31.3); 
culmen, 18-20 (18.7).¢ 
Adult female—Similar to the adult male, but slightly duller in 
color, especially the under parts, nearly the whole abdomen being 
dull cinnamon-buffy, the feathers of chin and throat showing more 
or less of the basal or subterminal white; length (skins), 88-98 (92); 
wing, 52-55 (53.6); tail, 29.5-32 (30.2); culmen, 18-20 (19).° 
Eastern and east-central Mexico, in States of Vera Cruz WJalapa; 
Cérdova; Orizaba; Jico; Playa Vicente; Cofre de Perote; Coatepec; 
Omealca; Tospén), Mexico (Valley of Mexico), Morelos (Cuernavaca), 
Oaxaca (Pluma; Oaxaca; Villa Alta; Toténtepec; Chimalapa), and 
Guanajuato (Moro Ledén).¢ 
Trochilus beryllinus LicHTENSTEIN, Preis-Verz. Mex. Vég., 1830, 1 (Mexico); 
Journ. fiir Orn., 1863, 55. 
Plyrrhophaena] beryllina CaBanis and HzEIne, Mus. Hein., iii, 1860, 36. ; 
Pyrrhophena beryllina Mutsant and VERREAUX, Hist. Nat. Ois.-Mouch., i, livr. 
4, 1874, 303; iv, livr. 3, 1878, 182 (Cérdova, Tospén, and Orizaba, Vera 
Cruz).—Gou1p, Introd. Troch., oct. ed., 1861, 158.—Bovucarp, Notes quel- 
ques Troch., 1873, 12 (Cérdova; Orizaba; Oaxaca). 
@ Ten specimens. 
b Four specimens. 
¢ Specimens from Guanajuato are intermediate between the typical form and 
S.b. viola. 
81255°—Bull. 50—11——29 
