250 



beforo me, and in view of the close relationship subsisting between 

 C. necra and C. renone, I doubt the existence of more than one form 

 of the former. The points relied upon by Gould seem all to be due 

 to individual variation, and the birds themselves to be connected 

 with the typical form by gradual steps. 



Hah. Upper Amazons Valley ; Bolivia. 



a. (5 ad. sk. 



ad. sk. 



0. S f'd. sk. 

 p. 5 fid. sk. 



q,r. 



s. d 



cJ ad. sk. 

 ad. sk. 



t. (S ad. sk. 



, V. <S ad. ; w. 

 ad. sk. 

 -z. (S ad. sk. 



Amazons (Bates ?). 

 Pebas, Amazons, Feb., April 

 to Aug. (J. HmixiveU). 



Tilotilo, BoUvia {C. Bucldei/). 

 Consata, Bolivia (C. Buckley). 

 Bolivia (Buckler/). 



Gould Coll. 

 Salviu-Godman, 

 Gould, & Sclater 

 CoUs. 

 Salviu-Godman Coll. 

 Salviu-Godman Coll. 

 Gould CoU. 

 Gould Coll. 

 (Type of 0. 7ieera, Less.) 



P Gould Coll. 



(Type of C. cceruleicapilla, Gould.) 



Transitional Specimens. 

 Upper Amazons {E. Bartleit). Gould Coll. 



Pebas, Amazons, Feb., Aug. Gould Coll. 

 (/. I£au.vwell). 



3. Chrysuronia humboldti. 



TrocLilus humboldti, Bourc. 8f Muls. Ann, Sc. Phys. et Nat, Lyon, 

 (2) iv. p; 142 (1852)._ 



Chrysuronia humboldti, Reich. Aufz. d. Col. p. 9 ; Bp. Rev. Zool. 

 1854, p. 254 ; Gould, Mon. Troch. v. pi. 327 (May 1859) ; id. 

 Intr, Troch. p. 165 ; id. Ibis, 1867, p. 247 ; Muls. Hist. Nat. Ois.- 

 Mouches, iv. p. 187 ; id. Ann. Soc. Linn. Lyon, xxii. p. 207 ; Elliot, 

 Syn. Troch. p. 168 ; Eudes-Desl. Ann. Mus. Caen, i. p. 436. 



Chrysurisca humboldti. Cab. Sf Seine, Mus. Hein. iii. p. 42. 



Hylocharis humboldti, Mids. ^ Verr. Class. Troch. p. 38. 



Thaumatias viridicaudatus, Later. Ami. Lye. N. Y. viii. p. 404. 



Adult male. Upper surface shining green, bronzy in the middle 

 of the back ; crown and upper part of the throat glittering blue ; 

 breast and abdomen glittering golden green, centre of the abdomen 

 and under tail-coverts white ; tail shining olive-green ; bill flesh- 

 colour, tip black. Total length about 4 inches, wing 2-5, tail 1'35, 

 bUl 0-8. 



Female. Similar to the male on the upper surface, but with the 

 crown dark shining green ; under surface white ; sides of the neck 

 and flanks with green discal spots ; lateral rectrices tipped with 

 whitish, preceded by a dark subterminal bar. 



IJab. Western Ecuador. 



a, b. (J 2 ^d. sk, 



Esmeraldas, Ecuador. 



Gould Coll. 



