34^ Genera of Humining Birds. . 



Male. — Upper-parts olive-brown, throat metallic grass- 

 green, under-parts bluish-black. Uppertail-coverts shining 

 green, under-coverts olive-brown, margined with buff. Tail 

 steel-blue, with green reflections. Bill and feet black. 



Total length, 4fin. Wing, 2|. Tail, 2. Culmen, J. 



Female. — Upper-parts light brown, with a greenish lustre. 



Uppertail-covers shining green. Throat white, unspotted. 



Under-parts brownish-white, tinged with buff. Undertail- 



<:overts bulïy-brown. Tail shining green, all the lateral 



feathers tipped w^ith white. 



" Elliot's Synopis of the Humming Birds, p. 36." 



This rare species is one of my desirata. The specimens 



from which Mr. Elliot made his descriptions were collected in 



Peru, by Mr. Jelsky. 



.471. Alcidius ADEL.AE, d'Orb. and Lafr., Syn. Av., 1838, 



P- 33- 

 Orthorhynchus adda, d'Orb., Voy. Amer., Mérid., vol. iv., 



P- 377- 



Oreotrochilus adelae, Gould, Mon. Troch., vol. ii., p. 73. 



Adela^s Hill- Star, Gould, Mon. Troch., vol. ii, p. 73, 



I'Orotrochile d'Adèle, Muls., Hist. Nat. Ois. Mou., 1876, 

 t. ii, p. 175. 



Habitat. — Bolivia. 



Male. — Upperside olive-brown. Tail cuneate. Median 

 rectrices dark brown, remainder pale buff, margined and 

 tipped with olive-brown. Throat metallic golden-green, 

 beneath which is a narrow band of black. Underside deep 

 chestnut with a central line, and the lowerpartof abdomen black. 

 Vent buff. Undertail-coverts olive-brown, margined with 

 buff. Wings brown, with a bronzy-green gloss. Bill and 

 feet black. 



Total length, 5in. Wing, 2|. Tail, 2\. Culmen, i. 



Fejnale. — Differs by having the throat white, spotted with 

 olive-brown, underside wholly rufous, and the- lateral tail 

 feathers buff, with a subterminal black bar, and tipped with 

 white on the inner webs. 



This is a very rare species. I have only one fine male speci- 

 men, collected in Bolivia, by Buckley. It was discovered in the 

 neighbourhoods of Chuquisaca, Bolivia, by Mr. Alcide 

 d'Orbigny. 



