466 SYSTEMATIC SYNOPSIS, — PICABI^ — CYFSELIFOBMES. 
with dusky; others green (or gray) for a distance decreasing on successive feathers, crossed 
with black, tipped with white to reciprocally increasing extent, and touched with rufous at 
base, as in several allied species ; but the small size, slight rufous on tail, and the extensive 
rufous on under parts, are characteristic. Mts. of whole Pacific slope, U. S. ; E. to Nevada; 
S. into Mexico. 
141. CALOTHO'RAX. (Gr. xaXoy, Z:aZos, beautiful ; ^wpa^, f7iora;r, chest.) Lucifer Hummers. 
Very different from any of the foregoing. Bill curved throughout, longer than head ; but nasal 
scale covered as usual by feathers, and color of bill black. Tail deeply forked ; lateral tail- 
feather shorter than next, and in our species filiform and acicular. Tarsi partly plumose. 
Sexes unlike. 
418. C. lu'cifer. (Lat. Lucifer^ the light-bearer; lux, light, /ero, I bear. Fig. 315.) Lucifer 
Humming-bird. $ : Above, bronzy-green ; gorget lilac- 
purple ; wings and tail purplish-dusky. Below, white^ 
bronzed with green on the flanks. Bill black. Length 3.25 ; 
Aving 1.50; tail 1.35; bill 0.75. Above, like $, but 
browner on head; n) gorget; under parts rufous. Middle 
tail-feathers bronzy-green, next green tipped with black; 
the rest rufous basally, then crossed with black and tipped 
with white. Tail shaped as in the (My description is 
unsatisfactory; but the species should be known by the 
curved bill.) Arizona : introduced into our fauna upon 
Lucifer Humming-bird, ^ 9 wrongly identified as '^Doricha enicura." (See Bull. 
cf,nat. size. (From Elliot.) J^utt. Club, ii, 1877, p. 108.) 
142. AMAZI'LIA. (Latinized from amazili, vox barb.) Amazili Hummers. Belonging to a 
group Avhich includes Basilinna and laclie; very unlike any of the others. Nasal scale large 
and tumid ; nasal slit entirely exposed ; feathers extending in a point on the sides of the cul- 
men, sweeping obliquely across the basal part of the nasal scale, and forming at the angle of 
the mouth a deep re- entrance with those of the chin, which reach much farther forward on the 
interramal space. Bill light-colored, dark-tipped, quite broad and flattened at base, thence 
gradually tapering to the acuminate tip, slightly bent downward, the curve most noticeable 
just back of the middle. Tarsi appearing feathered nearly to the toes, but really naked except 
at the top in front. No lengthened ruflfs or tufts about the head ; no metallic scales on top of 
head, difi'erent from those of the upper parts at large ; no special head-markings. Tail ample, 
forked or emarginate, the feathers all broad and obtuse, with simply rounded ends. No peculiar 
primaries, though the outer ones are narrower and more falcate than the next. Of large size, 
usually 4-5 inches. Sexes alike in form and color. An extensive genus, covering some 25 
species, two of which are known to reach our border : above characters more particularly 
applicable to these. 
419. A. fuscocauda'ta. (Lat. /i*5C0, with dusky, cawcZato, tailed.) Dusky-tailed Humming-bird. 
$ 9 ■ Above, metallic grass-green, or golden-green, more brassy on crown and rump, the long 
upper tail-coverts cinnamon -rufous. Wings purplish-dusky, their coverts like back. Tail 
deep chestnut, the feathers edged and ended with bronzy-purplish. Throat, breast and sides 
metallic green, glittering emerald in certain lights on the former, on the latter duller and more 
bronzy ; feathers gray beneath the metallic tips, and this color prevailiug on the abdomen ; 
crissum rufous ; flank-tufts fleecy white. Bill extensively light-colored, dusky at end. 
Length about 4.00 ; wing 2.25 ; tail 1.60 ; bill 0.80. Difi"ers from the next in not having the 
under parts extensively fawn-colored. Lower Rio Grande of Texas, to S. Am. 
420. A. cerviniven'tris. (Lat. cervinus, like a deer, cervus; in this case meaning fawn-colored r 
-yenim, of the belly.) Rufous-bellied Humming-bird. ^9' Upper parts sliiniug golden- 
green, nearly uniform from head to tail, but top of the head rather darker, and with a reddish 
