346 Genera of Humming Birds. 



forms, especially in the form of the tail, and in the metallic 

 colouring of head and throat, from the two well-known species, 

 O. pichincha and O. chimborazo. For these two last species, 

 I have retained the generic name of Oreotrochihis, Gould 

 considering that it was more proper to make a new genus, in 

 honour of D'Orbigny, with the species discovered by this 

 eminent Naturalist. I hope that all my scientific colleagues 

 will agree with me in this, and will adopt it. 



468. Alcidius bolivianus, Boucard, H. Bird, 1893, vol. iii., 



p. 7. 



Oreotrochihis boliviajius, Boucard, H. Bird, 1893, vol. iii., 

 p. 7. 



Bolivia?! Hill Star. 



I'Alcide de Bolivia. 



Habitat. — Bolivia. 



Male. — Upperside olive-brown passing to shining reddish- 

 bronze on uppertail-covcrts. Median rectrices dark shining 

 bronze-green, laterals white edged outwardly wath dark brown, 

 outermost ones white at base internally, and the remainder 

 dark greenish-black. Throat glittering green, with an 

 imperceptible dark blue margin at base. Breast and abdomen 

 grayish-white passing to grayish-buff on fianks. A narrow 

 line of greenish-blue in the middle of the abdomen. Undertail- 

 coverts grayish-brown. Wings brown externally, and purplish 

 internally. Bill black and curved. 



Total length, 4fin. Wing, 2|. Tail, 2\. Culmen, i. 



Female. — Upperside like that of the male. Lateral and 

 outermost rectrices with white tips. Underside grayish-brown 

 with minute green spots on tfiroat. This new species is 

 closely allied to O. lencopleuriis, from which it differs by the 

 band of the throat which is scarcely perceptible, the line in 

 the centre of abdomen which is very narrow, and greenish- 

 blue, and the tail and uppertail-coverts differently coloured. 

 It forms the passage between O. estellae and O. leiicopleiirus. 



Discovered by Buckley, in Bolivia. Types in Boucard's 



Museum. 



