84. lOLjsMA. 321 



4. Heliodoxa xanthogonys. 



Ileliodoxa xanthofronvs, Salv. i^- Godin. Ibis, 1882, p. 80 ; Whitely, 



Ibis, 1884, p. 3-57 ; Salv. Ibis, 1885, p. 433. 

 Xanthogenyx salvini, (VHamonv. Bull. Soc. Zool. Fr. viii. p. 77 



(1883). 



Adult male. Upper surface dark shining grass-green ; crown 

 black, Avith a comparatively narrow glittering green central stripe 

 extending from the forehead ; under surface glittei-ing green, with 

 a slight blue tinge ; gular spot bright blue ; tail steel-blue, the 

 central rectrices slightly tinged with purple ; bill black, the man- 

 dible for two thirds of its length yellow. Total length about 

 4 inches, wing 2*45 ; tail (nearly even), central rectrices 1"3, 

 lateral 1-4 ; bill 0-95. 



Female. Uniform dark grass-green above ; under surface white, 

 each feather with a bright green discal spot ; lateral rectrices tipped 

 with white. 



Young males have dark throats on which the bright feathers of 

 the adult begin to appear ; there are also some rufous feathers 

 about the gape. 



Hob. British Guiana. 



a. S ad. ; 6, c. 5 Merum6 Mts., Brit. Guiana, Salvln-Godman Coll. 



ad.sk. 3uue.,3\Ay (H. Whitely). (Types of the species.) 



d. (S juv. sk. Roraima, Brit. Guiuna, Jan. Salvin-Godman Coll. 

 (//. Whitely). 



84. lOL^MA. 



Type. 



Heliodoxa y. lonolaima, Reich. Aiifz. d. Col. p. 9 ... . I. schreibersi. 



lonolaima, Gotdd, Mon. Troch. ii. pi. 93 (May 1857) . . I. schreibersi. 



lolsema, Gould, Intr. Troch. p. 73 I. schreibersi. 



Bange. Upper Amazons Valley and Peru. 



Key to the Species. 



a. Gular spot glittering violet-purple. 



a'. Breast glittering green schreibersi, p. 321. 



6'. Breast black whitelyana, p. 322. 



b. Gular spot glittering fiery golden, changing with 



the incidence of light to golden green luminosa, p. 323. 



1 . lolsema schreibersi. 



Trochilus schreibersi, '•' Lodd.,'" Bourc. P. Z. S. 1847, p. 43 ; id. Rev. 



Zool. 1847, p. 255. 

 Thalurania schreibersi, Bp. Consp. i. p. 77. 

 Campy lopterus schreibersi, Bp. Rev. Zool. 1854, p. 250. 

 Heliodoxa y. lonolaima schreibersi, Reich. Troch. Enum. p. 6, pi. 745. 



ff. 4710-11. 

 lonolaima schreibersi, Gotdd, Mon. Troch. ii. pi. 93 (May 1857) ; id. 



Intr. Troch. p. 73 ; Tacz. P. Z. S. 1874, p. 543. 

 lonolaima frontalis, Lawr. Ann. Lye. N. T. vi. p. 263. 



rOT,. XVI. T 



