386 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.xxiv. 
series are in process of change from the g-reen-backed to the purple- 
backed plumage, and exhibit various .stages in this transition, from the 
presence of a few purple feathers sprinkled among the green to an 
almost solidly purple upper surface with a few scattered green feathers. 
So far as these examples indicate, the sides of the neck and back are 
the last portions to change. 
From both sides of the Andes at elevations of from 10,000 to 12,000 feet. Local 
name, "Obispos" — l)ishops. 
OPISTHOPRORA EURYPTERA (Loddiges). 
Trocliilns t'ltri/jderux LouDiGEs, Proc. Zool. Soc. Lond., 1832, y>. 7. 
Opisthoprora euryptera Cabanis and Heine, Mus. Hein., Ill, 1860, p. 76. 
Four specimens from Papallacta, east Ecuador. This is apparently 
the first time the species has been taken in Ecuador, but these examples 
are exactly like a specimen from Colombia. The female is colored like 
the male, but is appreciably smaller. 
From Papallacta, east Ecuador, 11,500 feet. Four shot on the same tree — one on 
each of four successive mornings. They feed on the flowers of the red datura and 
pierce them with their bills at the base. 
CYANOLESBIA KINGII MOCOA (DelaUre and Bourcier). 
Trochilus mocoa Delattre and Bourcier, Rev. Zool., 1846, p. 311. 
Ci/anolesbia kingi mocoa Simon, Cat. Troch., 1897, p. 34. 
Thirty-three specimens, all from Baeza, east Ecuador. 
The typical form of this species is the Oi/anolesbia cyanura of Har- 
tert,^ which is the Cyanoleshla gorgo of Salvin^ and Sharpe.^ Neither 
of these names is, however, the proper one for the species, since the 
first is preoccupied by Trochilus cyanur m GnwoWw^ and Vieillot,^ and 
the second is antedated by Ornismyia Mngii Lesson," which last 
name, though based on a bird from erroneous locality, must become the 
proper name for the species. The various races, according to Har- 
tert's catalogue,' will thus stand as follows: 
Cijanolesbui kingi i kbigii (Lesson). 
Cyanoleshla kingil emmae (Berlepsch). 
Cyanolesbia kingii mocoa (Delattre and Bourcier). 
Cyanolesbia kingii smaragdina (Gould) . 
Cyanolesbia kingii margarethae (Heine). 
Cyanolesbia kingii caudata (Berlepsch). 
iTierreich, IX, 1900, p. 175. 
^Cat. Birds Brit. Mus., XVI, 1892, p. 137. 
3 Hand List Gen. and Spec. Birds, II, 1900, p. 135. 
*Syst. Nat, I, 1788, p. 485. 
SNouv. Diet. d'Hist. Nat., VII, 1817, p. 369. 
«Hist. Nat. Troch., 1832, p. 107, pi. xxxviii. 
'Tierreich, IX, 1900, pp. 175-177. 
