BIRDS OF NORTH AND MIDDLE AMERICA. 367 
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outermost primary longest. Tail more than half as long as wing, 
slightly’ double-rounded, the rectrices broad, rounded at tip. 
Coloration.—Above, including tail, plain olivaceous glossed with 
bronze or bronze-green; beneath plain brownish gray; a dusky 
auricular or suborbital spot; sexes essentially alike, but female with 
a.broad subterminal area of black and terminal area of gray or 
brown on lateral rectrices. ) 
Range.—Mexican plateau. (Monotypic.) 
Authorities have disagreed widely as to the relationship of this form, 
Elliot placing it near Doleromyia (=Leucippus) (a South American 
genus) and placing by far the greater number of genera between it and 
Cynanthus (‘‘Iache”), while Hartert unites it with the latter. I 
agree with Hartert in considering it most closely related to the latter, 
but would separate it generically on account of the differences men- 
tioned in the above diagnosis. 
PHAOPTILA SORDIDA (Gould). 
DUSKY HUMMING BIRD. 
Adult male.—Above dull metallic bronze-green or greenish bronze, 
usually much duller (sometimes dull brownish gray or grayish 
brown) on forehead and crown and on upper tail-coverts; tail dull 
greenish bronze or grayish brown glossed with greenish bronze, the 
rectrices dusky basally, this occupying more than basal half of 
lateral rectrix; remiges purplish dusky, the outermost primary nar- 
trowly edged with pale gray or grayish white; a pale gray or grayish 
white postocular spot, and beneath this a poorly defined dusky 
area extending to beneath eye; under parts deep sooty gray (nearly 
mouse gray), deepest on throat, the feathers of which usually have 
a darker subterminal (concealed) area; femoral tufts and tuft on 
each side of ramp white; shorter under tail-coverts brownish gray, 
the longer ones mostly buffy; bill brownish (reddish in life), passing 
into dusky terminally (more or less extensively); iris dark brown; 
feet dusky; length (skins), 98-106 (101); wing, 56.5-57 (56.8); tail, 
35-35.5 (35.3); culmen, 27.5-29 (28.3).% 
Adult female.—Similar to the adult male but four lateral rectrices 
(on each side) bronzy green (duller and more grayish on lateral 
rectrix) crossed by a broad subterminal band of dull blue-blackish 
and tipped with pale brownish gray or grayish brown (most broadly 
on outermost rectrix); remiges paler and less purplish dusky, and 
gray of under parts averaging slightly paler than in adult male; 
length (skins), 101-103 (102); wing, 55; tail, 31.5-32 (31.7); cul- 
men, 29.° 
a Three specimens. b Two specimens. 
