BIRDS OF NORTH AND MIDDLE AMERICA, 619 
rounded at tip; in adult females about half as long as wing, rounded, 
the lateral rectrices broad and rounded. 
Coloration—Above metallic bronze-green, including middle rec- 
trices, or (in C. helen) bluish green passing into blue onmiddle rec- 
trices; beneath mostly, or in large part, whitish or pale grayish. 
Adult male with entire head glittering metallic purplish red or (in 
C. costx) violet, the feathers of sides of throat much elongated, and 
lateral rectrices plain dusky; adult females and young with pileum 
brownish gray (sometimes faintly bronzy or greenish), the chin and 
throat, dull white (sometimes flecked or streaked with dusky or 
spotted with metallic red or violet), the lateral rectrices grayish 
basally and broadly tipped with white. 
Range.—Southwestern United States and northwestern Mexico 
(two species) and island of Cuba (one species). (Three species.) 
KEY TO THE SPECIES OF CALYPTE. 
a. Throat brilliantly metallic purplish red or violet, the pileum of same color. (Adult 
males.) 
b. Larger (wing more than 40, tail more than 20, exposed culmen more than 15); 
middle rectrices metallic green or bronze-green. 
c. Head metallic purplish red; wing 48.5-51 (49.7), tail 30.5-32.5 (31.3). (Cali- 
fornia to northwestern Mexico.).........- Calypte anna, adult male (p. 619). 
cc, Head metallic violet, changing to blue; wing 43-45.5 (44.4), tail 22-24.5 (22.6). 
(Northwestern Mexico to southern California and Nevada.) 
Calypte costz, adult male (p. 623). 
bb. Smaller (wing less than 30, tail less than 17, exposed culmen 10); middle rec- 
trices metallic blue. (Cuba.).........-. Calypte helenz, adult male (p. 625). 
aa. Throat pale gray or dull whitish (sometimes flecked with dusky or with a few 
metallic red or violet feathers); pileum greenish, like back, or grayish. (Adult 
females.) 
b. Larger (wing more than 40, tail more than 20, culmen 17 or more); middle rec- 
trices metallic green or bronze-green. 
ce. Wing 48-51 (49.6); under parts darker grayish; lateral rectrices broader and 
more rounded, 5 mm. wide at base of deeper gray tip. 
Calypte anna, adult female (p. 620). 
cc, Wing 43.5-46 (44.7); under parts paler grayish; lateral rectrices narrower and 
more pointed, not more than 4 mm. wide at base of paler gray tip. 
Calypte costz, adult female (p. 623). 
bb. Smaller (wing less than 35, tail less than 20, exposed culmen less than 12); mid- 
dle rectrices metallic blue or greenish blue. 
Calypte helenz, adult female (p. 626). 
CALYPTE ANNA (Lesson). 
ANNA HUMMING BIRD. 
Adult male—Whole head except occiput and auricular region bril- 
liant metallic rose red, changing to solferino and violet in certain 
lights (more golden or even greenish in position b), the latero-posterior 
feathers of throat elongated; a small postocular spot or streak of 
white; occiput (except laterally, where at least partly metallic 
