306 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 
kk. Bill not decidedly if at all decurved; tarsi mostly feath- 
ered; upper tail-coverts normal (covering less than basal 
half of tail). 
i. An auricular tuft of blue, violet, or reddish purple; tail 
blue, green, or bronzy olive, with a darker subterminal 
atid. tscloc ees oes ee ot semen tee cee ees Colibri (p. 480). 
ll. No auricular tuft; tail not blue, green, or bronzy with 
darker subterminal band. 
m. Exposed culmen only one-fourth as long as wing, less 
than two-fifths as long as tail; remiges rufous-chestnut 
basalllyeo situa tieadelse tea betier Lamprolaima (p. 489). 
mm. Exposed culmen more than one-fourth as long as wing, 
more than one-third as long as tail (or else the latter 
long and deeply forked); remiges wholly dusky. 
n. A white postocular spot or streak (if this minute 
(Panterpe), the pileum metallic blue and throat 
bright metallic orange or orange-red. 
o. Larger (wing more than 55 mm.). 
p. Postocular white spot or streak conspicuous; pill 
broader; throat never orange or orange-red; 
sexes different in color. 
q. Larger (wing 70 mm. or more); exposed culmen 
longer than head; under parts of body gray. 
r. Tail less deeply emarginate, the lateral rec- 
trices broadly tipped with white; adult 
male with throat metallic blue. 
Cyanolemus (p. 491). 
rr. Tail more deeply forked, the lateral rectrices 
without white tips; adult males with throat 
reddish purple to violet. 
Lampornis (p. 494). 
qq. Smaller (wing not more than 65 mm.); exposed 
culmen shorter than head; under parts not 
OTA cas 1a athena nace eine Oreopyra (p. 501). 
pp. Postocular white spot minute; throat metallic 
orange or orange-red, the sexes alike in color. 
Panterpe (p. 511). 
oo. Smaller (wing less than 50 mm.). 
p. Exposed culmen nearly half as long as tail, the 
latter much less than two-thirds as long as wing 
in male, only half as long in female; pileum 
metallic blue, the throat also blue in adult male. 
Rais (p. 513). 
pp. Exposed culmen but little more than one-third 
as long as tail, the latter two-thirds as long as 
wing in male, nearly two-thirds as long in 
female; pileum metallic green, the upper 
throat metallic emerald green in adult male. 
Abeillia (p. 516). 
nn. No white postocular mark, or else (Riccordia) tail 
deeply forked and adult male with under parts 
wholly green. 
o. Tail graduated................. Damophila (p. 518). 
oo. Tail not graduated. 
