460 SYSTEMATIC SYNOPSIS. — PICABI^ — CYPSELIFOBMES. 
If a female or young, he must refer to the detailed descriptions. He will be much assisted by 
the figures of generic details, drawn from nature by Mr. R, Ridgway for Mr. D. G. Elliot's 
monograph, and kindly loaned to me by Prof. Baird. 
Analysis of Genera and Species of N. A. Trochilidce (adult males). 
Frontal feathers not fully covering nasal scale. Tarsi feathered. Tail emarginate. Bill broad, in part 
flesh-colored. 
Nasal scale entirely naked. 
White stripe on head. Crown, face, and chin, black. Tail rufous Basilinna xantusi 407 
Nasal scale partly naked. 
Crown green ; throat blue ; tail blackish lache latirostris 421 
Throat green ; tail rufous ; sides rufous AmazUia cerviniventris 420 
Throat green ; tail rufous ; sides green Amaziliafuscocaudata 419 
Frontal feathers covering nasal scale. 
Bill not perfectly straight. 
Bill curved throughout. Tail forked, with almost filiform lateral feather . . Calothorax lucifer 418 
Bill nearly straight. Length over 4 inches. Throat and breast green .... Eugenes fulgens 408 
Bill perfectly straight. Length under 4 inches. 
Crown as well as throat with metallic scales. 
Scales lilac-crimson. Lateral tail-feather parallel-edged Calypte annce 414 
Scales violet. Lateral tail-feather acutely falcate Calypte costce 415 
Crown simply glossy, like back ; throat with metallic scales. 
Middle tail-feathers unlike back in color. 
Scales confined to ends of throat-feathers, their bases snow-white . . . Stellula calliope 417 
Middle tail-feathers like back in color ; throat-scales forming a continuous surface. 
Lateral tail-feathers white-tipped ; none acuminate. Outer primary abruptly emarginate 
and acute Atthis heloisce 416 
Lateral tail-feathers not wl^te-tipped ; some or all acuminate. 
Throat-scales coppery-red; back and tail greenish; outer two primaries acute, falcate; 
all the tail-feathers acuminate, the two outer acicular Selasphorus alleni 412 
Throat-scales coppery-red; back and tail mostly chestnut; primaries as in S. rufus; 
next to middle tail-feather abruptly notched Selasiihorus rufus 411 
Throat-scales lilac-red; back golden-green; 1st primary emarginate, turned outward, 
next obliquely incised at end Selasijhorus platycercus 413 
Throat-scales opaque black, becoming violet posteriorly ; back golden-green ; primaries 
not peculiar Trochilus alexandri 410 
Throat-scales ruby-red; back golden-green. Primaries not peculiar (Eastern) 
Trochilus colubris 409 
134. BASILIN'NA. (Gr. ^aaiktwa, hasilinna, a queen.) Queen Hummers. Head appearing 
more globose than in any other N. Am. genus, in consequence of tlie non-extension of the 
feathers on base of upper mandible, wliere they do not reach 
opposite those on chin, leaving the turgid nasal scale entirely 
\ exposed. Bill broad at base, tapering regularly to tip, ith dis- 
tinct supra-nasal grooves; scarcely longer than head, straight. 
Tarsi feathered. Tail ample, all the feathers broad and 
-"^^L^^ — ^'fy~ ^ ^^^^^'\U i) '^^^'^^^^^ j nearly even, in ^ a little double-rounded by short- 
' ^ ness of both lateral and central pair of feathers, in 9 simply a 
little rounded. No peculiarity of primaries. Sexes nearly alike 
in form ; 9 lacking the green gorget of $ ; bill in both sexes 
Fig. 300.— Xantus Humming- largely flesh-colored; J' with white stripe on head; no white 
bird, nat. size. (From Elliot.) ^^^j ^f either sex. (N. B. This genus would be better 
ranged next after lache.) 
40T. B. xan'tusi. (To L. J. Xantus de Yesey. Fig. 300.) Xantus Humming-bird. Adult ^ : 
Above, and the throat, metallic grass-green ; below, cinnamon-rufous ; face blue-black ; a 
white stripe through the eye ; wings purplish-dusky ; tail purplish-chestnut, the central feathers 
glossed with golden-green ; bill flesh-colored, black-tipped. ^ : Shining green above, including 
central tail-feathers ; below, and the face, pale rufous, whitening about the vent, and the sides 
greenish ; head-stripe rufous, whitening on the auriculars ; tail-feathers, except the central, 
