8. CHLOEOSTILBON. 45 



Key to the Sjjecies, 



a. Bill black at the tip, botli maxilla and inau- 

 dible flesb-colour at the base. 

 a'. Central rectrices steel-blue, more or less 

 tipped ■v\-ith grej. 

 a". Tail very deeply forked. 



a". Lateral rectrices narrow auriaeps, p. 45. 



V". Lateral rectrices wider forficatm, p. 46. 



h". Tail less deeply forked caniveti, p. 46. 



b'. Central rectrices uniform steel-blue. 

 c". Larger ; abdomen usually more golden, sjileiididus, p. 49. 

 d". Smaller ; abdomen usually greener . . puc/ierani, p. .50. 



d. Bill black, basal half of the mandible flesh- 



colour. 



c'. Under surface glittering golden green, 

 not tinged with blue ; crown mode- 

 rately brij^ht ; tail moderately forked. . aiujustipennis, p. 52. 



d'. Under surface glitteriug green, tinged 

 with blue in certain lights ; tail more 

 deeply forked haeberlini, p. 53. 



e. Bill wholly or nearly black. 



e'. Tail forked, lateral rectrices rather 

 narrow. 



e". Cro-nu moderately bright melanorhynchus, p. 5.3. 



/'. Crown very bright immilus, p. 54. 



g". Crown dull like the back assimilis, p. 54. 



/'. Tail shorter, less forked ; lateral rectrices 



'n'ider atala, p. 55. 



(J . Tail rounded or very slightly forked. 

 /(". Tail very slightly forked or rounded, 



steel-blue prasmus, p. -56. 



i". Tail rounded, purple-black peruanus, p. 57. 



1. Clilorostilbon auriceps. 



Trochilus auriceps, Gould, Contr. Orn. 1852, p. 1.37. 



1889, p. 366. 



Chlorolampis auriceps, Cab. iy Heine, Mus. Hein. iii. p. 48 ; Goidd, 

 Intr. Troch. p. 174 ; Heine, J. f. Orn. 1863, p. 200 ; 3fuls. Hist. 

 Xcd. Oi^.-Mouches, ii. p. 79, iv. p. 198 ; id. Ann. Soc. Linn. Lyon, 

 xxii. p. 209 ; Eiides-I)esl. Ann, Mus. Caen, i. p. 511. 



Adult male. Upper surface shining golden green, crown glitteriuo- 

 golden green ; entire under surface glitteriug green with a golden 

 tinge ; tail very long, steel-blue, all the rectrices except the outer- 

 most one on either side more or less tipped with grey ; bill black 

 at the tip, the mandible at the base aud the maxilla for most of 

 its length tiesh-colour. Total length about 3-6 inches, wing 1-7, 

 lateral rectrices 1*6, central 0*6, bill 0-6. 



Adalt female. Upper surface shining grass-green, a postoculai' 



