BTKDS OF NORTH AND MIDDLE AMERICA. 619 



rounded at tip; in adult females about half as lono; as wintj;, rountled, 

 the latei'al reetrices broad and rounded. 



Coloration. — Above metallic bronze-green, including middle ree- 

 trices, or (in C. hehmsL) bluish green passing into blue on middle ree- 

 trices; beneath mostly, or in large part, whitish or pale grayish. 

 Adult male with entire head glittering metallic purplish red or (m 

 C. cosix) violet, the feathers of sides of throat much elongated, and 

 lateral reetrices 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 reetrices 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 reetrices 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 43-15.5 (44.4), tail 22-24.5 (22.6). 

 (Northwestern Mexico to southern California and Nevada.) 



Calypte costae, adult male (p. 023). 

 bb. Smaller (wing less than 30, tail less than 17, exposed culmen 10); middle ree- 

 trices metallic blue. (Cuba.) Calypte helense, adult male (p. 625). 



an. Throat pale gray or dull whitish (sometimes flecked with dusky or with a few 

 metallic red or violet feathers); ])ileum greenish, like back, or grayish. (Adult 

 females.) 

 b. Larger (wing more than 40, tail more than 20, culmen 17 or more); middle ree- 

 trices metallic green or bronze-green. 

 c. Wing 48-51 (49.6); under parts darker grayish; lateral reetrices 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 reetrices narrower and 

 more pointed, not more than 4 mm. wide at base of paler gray tip. 



Calypte costse, adult female (p. 623). 

 bb. Smaller (wing less than 35, tail less than 20, exposed culmen less than 12); mid- 

 dle reetrices metallic blue or greenish blue. 



Calypte helense, adult female (p. 626). 



CALYPTE ANNA (Lesson). 



ANNA HUMMING BIRD. 



Adult male. — Whole head except ()C('ij)ut and auricuhu- region bril- 

 liant metallic rose red, changing to solferino and violet in certain 

 lights (more golden or even gi-eenish in position h), the lat(M-o-])osterior 

 feathers of throat elongated; a small postocular spot or streak of 

 white; occiput (except laterally, where at least partly metallic 



