OREOTROC IIILUS. 35 



Key to the species. 



A. Under parts white. 



a. Head and throat sniiiiiig violet-bhie. 1.0. pkhincha. 



b. Head violet-blue, throat metallic-green. 2. 0. chimborazo. 



c. Head brown, throat metallic-green, abdomen chestnut. 3. 0. esiellee. 



d. Head brown, throat green, abdomen steel-blue. 4. leucopleurus. 



B. Under parts black, throat metallic-green. 5. 0. melanogaster. 



C. Under parts deep chestnut, central line of black, throat nietallic-grccn. 6. 0. adelse. 



1. Oreotrochilus pichincha. 



Trochilus pichincha, Bourc. and Mulp., Ann. Acad. Sc, Lyon (1849), p. 427. 



Oreotrochilus jamesonii, Jard., Contr. Ornith. (1849), p. 42. 



Oreotrochilus pichinrha, Bon., Consp. Gen. Av., vol. i, p. 76 (1850). — Id., Rpv. and M:\g. Zool. (1854). p. 250. 



— GocLD, Men. Troch., vol. ii, pi. 68. — Id., Intr. Troch., octavo ed., p. 6.3. — Rkii-ii., AuTz. der Colil>., p. 



15 (1853).— Id.. Troch. Enum. (18.55), p. 12. 

 Orotrochiiits pichincha. Cab. and Hkin., Mus. Hein. Th., iii, p. 15. — Mui.s., Hist. Nat. Ois. Moucb., torn, ii, p. 102. 



Hab. Ecuador, volcanoes of Pichincha and Cotopaxi. 



Male. Head and throat violet-blue, bounded beneath by a line of black. Upper 

 parts olive-green. Wings purple-brown. Under parts pure white; a line of green- 

 ish-black down the centre of abdomen. Under tail coverts olive-green Avith lidit 

 brown margins. Upper tail coverts briglit green. Median rectrices dark green ; 

 outermost ones white at base, greenisli-black for the remainder of their length ; 

 rest of tail feathers white, margined on outer webs with brownish-black. Bill and 

 feet black. Total length, b^ in. Wing, 2| in. Tail, 2j in. C'ulmen, | in. 



Female. Entire upper parts olive-green ; throat white, each feather tipped with 

 olive, under parts olive-brown, the feathers margined with brownish-wliite. Median 

 rectrices dark green, remainder greenish-brown, white at base, and a white .spot on 

 the inner web at its tip. 



2. Oreotrochilus chimborazo. 



Trochilus chimborazo. Pei.att., Bourc, Rev. Zool. (1846). p. 305. 



Oreotrochilus chimborazo, Gould, Men. Troch., vol. ii, pi. 09. — Id., Intr. Troch., octavo ed., p. 62. — Gray, Gen. 



Birds, vol. i, p. 104, sp. 3. — Reich., Aufz. der Colib., p. 15. — Id., Troch. Enum., p. 12. — Box.. Consp. Gen. 



Av., vol. i, p. 06.— Id., Rev. and Mag. Zool. (1854). p. 250. 

 Orotrochilus chimborazo, Cab. and Hein., Mus. Hein. Th., iii, p. 15 (note 5). — Muls., Hist. Nat. Ois. Mouch., 



torn, ii, p. 166." 



Eab. Ecuador, volcano of Chimborazo. 



Male. This species differs from i\iii ■pichinclia in having a triangular spot of bril- 

 liant metallic-green on the throat. In all other respects the two are very similar 

 in color and dimensions. 



The female is so much like that of picliindia that it is impossible to tell them 

 apart, and an authentic locality is necessary to enable one to arrive at a correct 

 determination. 



