532 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 
c. Under parts of body violet-blue. (Thalurania colombica.) 
d. Upper back green or bronze-green medially; lower back and rump brighter 
green, the occiput and hindneck bronze-green or bronze. (Colombia and 
eastern Panam4.)..Thalurania colombica colombica, adult male (p. 532). 
dd. Upper back wholly violet or violet-blue; lower back and rump darker and 
duller green, the occiput and hindneck blackish green. (Costa Rica 
and western Panama.) 
Thalurania colombica venusta, adult male (p. 534). 
cc. Under parts of body bright metallic green (like throat and chest) except 
laterally. (Eastern Guatemala to southeastern Honduras.) 
Thalurania townsendi, adult male (p. 536). 
bb. Lesser wing-coverts and whole of scapular region bronze-green; breast and 
abdomen blackish; tail black. (State of Jalisco, western Mexico.) 
Thalurania ridgwayi, adult male (p. 537). 
aa. Throat and chest pale gray or grayish white. (Adult females.) 
b. Sides and flanks more extensively green or bronze-green. (Thalurania colom- 
bica.) 
ce. Under parts of body broadly pale gray medially. 
Thalurania colombica colombica, adult female (p. 533). 
ce. Under parts of body very narrowly grayish medially (usually wholly green). 
Thalurania colombica venusta, adult female (p. 535). 
bb. Sides and flanks less extensively green or bronze-green. 
Thalurania townsendi, adult female (p. 536). 
THALURANIA COLOMBICA COLOMBICA (Bourcier). 
COLOMBIAN WOOD-NYMPH. 
Adult male.—Forehead and anterior portion of crown bright metal- 
lic bluish violet or royal purple; rest of pileum dull bronze-green, 
bronze, or coppery bronze, the feathers narrowly and indistinctly 
margined with dusky; lower hindneck and upper back metallic bluish 
green or greenish blue, with a lateral patch (mostly on anterior scapu- 
lars) of intense violet-blue (confluent with the similar color of the 
lesser wing-coverts and under parts), the two patches of opposite 
sides sometimes narrowly but brokenly connected; lower back, rump, 
and upper tail-coverts deep metallic bluish green,“ varying to more 
bronzy green; tail glossy blue-black or black glossed with blue (some- 
times slightly violaceous) ; greater wing-coverts metallic bluish green; 
remiges dark brownish slate or dusky, faintly glossed with violaceous; 
chin, throat, and chest bright metallic yellowish emerald green, with 
a convex posterior outline, the feathers pale gray or grayish white 
beneath surface, dark gray basally; breast and abdomen rich metallic 
violet-blue or bluish violet (between hyacinth blue and royal purple), 
the feathers dark gray beneath surface; sides and flanks mixed dark 
metallic violet-blue and bluish green; under tail-coverts broadly white 
laterally and basally, bluish black or dark steel blue medially and 
terminally, the latter in form of a broad wedge-shaped area; bill dull 
@ Near terre-verte in hue, but much brighter. 
