426. Rivoli Hummingbird (Eugenes fulgens). L. 
5.1. A small white spot behiad eye. 3g Crown 
purple, throat bright green, back bronzy green; tail 
somewhat more bronzy. Ad. 9. Above bronzy green, 
all but central tail-feathers with blackish ends and 
narrow grayish tips; below grayish, all but throat 
feathers green centrally. Yng. 3. Throat with more or 
less green, belly and above more bronzy thanin @. 
Range.—Nicaraugua, north in mountains to mountains of southeast- 
ern Arizona,and southwest New Mexico; winters south of United 
States. 
429. Black-chinned Hummingbird (Trochilus alex- 
andrt), L. 3.5; W. 1.7. Ad. 3. Chin and upper 
throat black, lower throat amethyst; tail forked, 
feathers pointed. Ad. 2. Throat yrayish white; 
chin buffy; tail feathers more rounded, three outer ones 
tipped with white. Yung. g'. Similar to 9, but throat 
with dusky spots. 
Range.— Western United States; breeds from San Antonio, Texas, 
New Mexico, Arizona, and California north to Montana and British 
Columbia; rare on Pacific coast north of southern California; winters 
south of United States. 
430. Costa Hummingbird (Calypte cost#). L. 3.1. 
No rusty in plumage. Ad. o. Crown, throat and 
lengthened neck-feathers amethyst, back dull green. 
Ad. 9. Below grayish white; above grayish green; 
outer tail-feathers gray at base, then black and at tip 
white. Yung. 3. Similar to ¢, but throat usually with 
some amethyst spots; tip of outer tail-feather grayish. 
Range.—Northwestern Mexico; breeds north throughout Lower 
California, to southern California, northern Nevada, southwestern 
Utah, and southwestern New Mexico; winters from Mexican border 
southward. 
437. Lucifer Hummingbird (Calothorax lucifer.) 
L. 3.6; B. .8. Ad. &. Throat purplish pink, feathers 
at its side much lengthened; tail teathers very narrow, 
the outer ones less than .o5 in. wide on end half. 
Ad. 2. Below nearly uniform rusty buff, above bronzy 
green; tail-feathers white-tipped. 
Range.—‘‘From western Texas and southern Arizona south to the 
city of Mexico and Puebla.’’ (Bailey.) 
440. Xantus Hummingbird (Basilinna  xantust). 
L. 3.6. A white streak behind eye. Ad. Q’. Chin, 
forehead and cheeks Slack; throat green; tail rusty 
brown. Ad. Y. Below uniform rusty, above green; 
outer tail-feathers rusty brown. 
Range.—Lower California, north to Lat. 29°; most common in 
Cape Region. 
159 
Hummingbirds. 
