768 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 
TROGONURUS AMBIGUUS AMBIGUUS (Gould). 
COPPERY-TAILED TROGON. 
Adult male—Forehead (sometimes part, occasionally whole, of 
crown also) black; occiput (usually more or less of crown), hindneck, 
back, scapulars, and anterior portion of lesser wing-covert region 
bright metallic green, bronze-green, or golden bronze, passing into 
metallic pure green or bronze-green on rump and upper tail-coverts; 
middle pair of rectrices bright bronze or copper-bronze, changing to 
a greenish hue in some lights (the color sometimes more greenish 
basally), broadly and abruptly tipped with black or bluish black, 
the next pair of rectrices similarly colored on outer web, but inner 
web darker and more purplish bronze passing into blackish basally, 
the terminal black area broader and less sharply defined; remaining 
rectrices very broadly tipped with white (this white terminal area 
margined basally by a narrow, usually more or less interrupted, nar- 
row bar of black), the subterminal portion and greater part of outer 
web white, irregularly vermiculated or finely flecked with blackish 
(except sometimes on basal portion of outer web of outermost rec- 
trix), the basal portion of inner web uniform blackish; wing-coverts 
(except anterior portion of lesser covert area) delicately vermiculated 
with black and white; primaries slate-black, the outer webs mostly 
pale gray or grayish white; loral, suborbital, auricular, and malar 
regions, chin, and throat uniform black or slate-black; chest bright 
metallic bronze-green, bronze, or copper-bronze, succeeded by a 
crescentic band of pure white, the remaining under parts pure 
geranium red; thighs slate-black or blackish slate, the longer feather 
broadly tipped with pink or pinkish white; bill yellow; naked eyelids 
red or orange; iris dark brown; feet brownish; length (skins) , 255-295 
(278); wing, 127-136 (130.8); tail, 153.5-171 (165.6); culmen, 17-19 
(18.2); tarsus, 14.5-16 (15); inner anterior toe, 14-16.5 (14.9).¢ 
Adult female—Forehead and at least anterior portion of crown 
slate color or brownish slate, passing into plain brown (between 
isabella color and raw umber) on occiput, hindneck, back, and 
scapulars, the rump and upper tail-coverts similar but (especially the 
latter) paler; wing-coverts similar in color to rump and upper tail- 
coverts but (on very close inspection) minutely vermiculated with 
darker, the outer webs of secondaries similar but paler; primaries 
slate color or blackish slate, the outer web (except of outermost) 
broadly edged with white or grayish white; middle pair of rectrices 
vandyke brown to chocolate brown (sometimes lightening into russet 
or cinnamon-brown distally), broadly and abruptly tipped with 
black; next pair blackish brown or brownish black, the outer web 
more or less broadly edged (except terminally) with lighter brown; 
remaining rectrices extensively white terminally and (except on third 
@ Thirteen specimens. 
