LEUCIPPUS. 199 



Key to the species. 



A. Throat pure white; t<ail dark bronze-green. I. L. chionocjaster. 



B. Throat spotted with brown, tail pale greeu, tipped with grayish-white. 2. L. chloroccrcus. 



This genus is extremely close to Uranomitra, and it may wt^ll be questioned if 

 its members are really gencrically distinct from the species grouped together under 

 the above term. A sliglit difference in tlie shape of the bill at its base appears to 

 be the only generic character the two birds named above possess. 



1. Leucippus chionogaster. 



Trochilus {Lampomts) leiicogaster, Tsrn., Consp. Av., p. 37. 

 Tinchihis chionogaster, Tsoh., Faun. Per., p. 247, pi. 22, fig. 2 (1844). 

 Trochilus turneri, Bourc, Rev. Zool. (1846), p. 313. 



Trochilus ( .?) hypoleucus, Gould, P. Z. S. (1857), p. 90. 



Polytmus chionogaster, Gray, Gen. Birds, vol. i, p. 108, sp. 49. 



Polytmus hypoleucus. Gray, Gen. Birds, vol. i, p. 108, sp. 56. 



Thaumatias leucogaster, Bon., Consp. Gen. Av., vol. i, p. 78 (1850). 



Leucippus turneri, Bon., Consp. Gen. Av., vol. i, p. 73 (1850). — Reich., Aufz. der Colib. (1S53). p. 11. — Id., 



Troch. Enum., p. 8 (1855). 

 Thaumantias chionogaster, Bon., Rev. and Mag. Zool. (1854), p. 255. 

 Leucippus nigrirostris, Reich., Troch. Kiium., p. 8, t. 779, fig. 4812 ? (1855). 

 Leucippus chionogaster, Gould, Mou. Troch., vol. v, pi. 290. — Id., Intr. Troch., octavo ed.. p. 150. — Cab. and 



Rein., Mus. Hein. Th., iii, p. 31 (I860).— Muls., Hist. Nat. Ois. Mouch., torn, i, ji. 259. 

 Leucippus pallidus, Taczanow., P. Z. S. (1874), p. 542. 

 Leucippus leucogaster, Elliot, Ibis (1876), p. 8. 



Hah. Peru and Bolivia. 



Adult. Upper parts and flanks bronzy-green. Under surface pure white. Under 

 tail coverts pale green edged with white. Wings purplish-brown. Tail feathers 

 dark bronzy-green, with the inner webs and shafts of lateral ones wliite. Maxilla 

 and tip of mandible black, rest of latter flesh-color. Feet black. Total length, 3p 

 in. Wing, 2j in. Tail, l^ in. Culmen, | in. 



I have retained Tschudi's second name of chionogaster as being more strictly 

 correct than leucogaster. 



2. Leucippus chlorocercus. 



Leucippus chloroccrcus, Gould, P. Z. S. (18G6), p. 194. — Muls., Hist. Nat. Ois. Mouch., torn, i, p. 257. 



Hah. Banks of the upper Ucayali, eastern Peru. 



Adult. Tliis species resembles closely the L. chionogaster, but diff"ers in having 

 the throat spotted with brown. Tail pale green, with a faint subtcrminal bar of 

 darker green, and tipped with grayish-while, this extending as it goes outwards, 

 until it covers the whole outer web of the external feather. Bill black, feet brown. 

 Total length, 3j in. Wing, 2.^ in. Tail, 1| in. Cuhncn, | in. 



