30 TROCHILI. 



/', Bill nearly straight, stouter ; tail [p. 68. 



glittering green 15. Panychlora, 



g'. Bill decurved ; lateral rectrices 

 white at the base, 

 c". Bill comparatively long and 



less curved 16. Eupherusa, p. 72. 



d^. Bill shorter and more curved. 17. Elvira, p. 74. 

 d*^. Tail forked (crown glittering blue, 

 or green or greenish black ; no 

 white at the base of the lateral 



rectrices) 18. Thalurania, p. 76. 



g'". Bill stouter; tomia of mandible not 

 rolled inwards towards the tip. 

 e^. Cidmen feathered at the base ; nasal 

 covers partially exposed ; sexes 

 dissimilar. 

 h?. Under tail-coverts large and full ; [p. 87. 



tail bronze or greenish bronze. . 19. Hypuroptila, 

 t". Under tail-coverts normal ; latei'al 

 rectrices purple or reddish purple. 



e°. BiU moderately decurved. ... 20. Lampornis, p. 91. 

 y*. Bill upturned towards the base 22. Avocettula, p. 101. 

 y*. Culmen feathered at the base ; nasal 

 covers also feathered, except along 

 their lower edges ; sexes alike. 

 y°. Wings glittering metallic green ; 



no auricular glittering tufts . . 23. Ettlampis, p. 102. 

 ¥'. Wings normal, no glittering blue 



auricular tufts 21. PiNAROL^MA.p.lOl. 



Z'. Wings normal, purplish black; [p. 105. 



glittering blue auricular tufts . . 24. Petasophora, 

 g"^. Culmen feathered a long way from 



the base ; nasal covers completely [p. 113. 



hidden ; sexes dissimilar 25. Chrysolampis, 



1. HELIOTHRIX. 



Type. 

 Heliothrix, Boie^ Isis, 1831, p. 547 H. auritus. 



Range. Tropical America, from British Honduras and Guatemala 

 to Southern Brazil. 



Key to the Species. 



a. Crown glittering green. 



a. Throat white auritus, p. 30. 



b'. Throat glittering green auriculatus, p. 32. 



b. Crovsm glittering blue barroti, p. 32. 



1. Heliothrix auritus. 



Trochilus auritus, Gm. Syst. Nat. i. p. 493 ; Lath. Ind. Orn. i. p. 311 ; 



Vieill. N. Diet. d'Hist. N. vii. p. 368 ; id. Enc. Meth. p. 567 ; Less. 



hid. Gen. Troch. p. xx ; Cab. in Schomb. Guiana, iii.p. 707. 

 L'Oiseau-Mouche a oreilles, Aud. Ois. Dur. i. p. 67, pis. 25, 26. 

 Orni.smya aurita, Less. Hist. Nat. Ois.-Mouches, pp. xix, 63, pis. 



Heliothrix auritus, Boie, Isis, 1831, p. 547; Gi'ag, Gen. B. i. p. 115 ; 



