306 vBULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



Tck. 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 tiift of blue, violet, or reddish purple; tail 



blue, green, or bronzy olive, with a darker sub terminal 

 band Colibri (p. 480). 



II. No auricular tuft; tail not blue, green, or bronzy with 



darker sub terminal band, 

 m. Exposed culmen only one-fourth as long as wing, less 

 than two-fifths as long as tail ; remiges rufous-chestnut 



basally 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 

 (Fanterpe), 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; bill 

 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. 



Cyanolsemus (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; imder parts not 



gray Oreopyra (p. 501). 



pp. Postocular white spot minute; throat metallic 



orange or orange-red, the sexes alike in color. 



Panterpe (p. 511). 



00. 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. 



Klais (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). 

 7171. No white postocular mark, or else (Riccordia) tail 

 deeply forked and adult male mth under parts 

 wholly green. 



o. Tail graduated Damophila (p. 518). 



00. Tail not graduated. 



