152 SYNOPSIS OF THE HUMMING-BIRDS. 



the edge of the outer web. Outermost rectrices black on their basal half, remain- 

 ing part deep metallic-blue. Under tail coverts shining green. A few white 

 feathers near the vent, and a minute white spot behind the eye. Bill and feet 

 black. Total length, 7f in. Wing, 2| in. Tail, 5§ in. Culmen, -/g in. 



Female. Crown dark shining green, not so brilliant as in the male. Upper parts 

 bright bronze-green. Throat grayish-white, each feather tipped with green. Under 

 surface rufous, washed with green on the flanks. Central rectrices shining green. 

 Lateral ones black glossed with dark blue, the outermost one tipped with white. 

 A white spot behind tlie eye. Bill and feet black. Total length, 3^ in. Wing, 

 2} in. Tail, \\ in. Culmen, \ in. 



There are two styles among individuals of this species, observable in the colora- 

 tion of their rectrices; some have these a uniform purplish-blue on their apical half, 

 while others have all but the outermost feather margined and tipped with metallic- 

 green. These styles do not seem to be peculiar to any particular locality, as both 

 are found in Columbia and elsewhere. Mr. Gould has separated the Ecuador bird 

 from the others, as C. ccelestis (1. c), on account of its size (!) and a coppery-brown 

 hue of the wider parts. I cannot perceive that this is in any wise a peculiar 

 character of Ecuadorian specimens, and consider Mr. Gould's species to have been 

 established upon too slight grounds to be maintained. The Venezuelan birds are 

 of a lighter green generally than those from the western part of South America, 

 and, as stated by Mr. Gould, are nearly destitute of the black line, bordering the 

 brilliant green of the crown; but, in my opinion, these characters are not worthy of 

 being considered as indicating a separate species. The different styles can only be 

 regarded as phases of plumage belonging to one widely distributed, variable species. 



2. Cynanthus mocoa. 



Troch/lus mocoa. Delatt. and BouRC, Rev. Zool. (1846), p. 311. 



Trochilus (Lesht'a) smaragdiiius, Gould, P. Z. S. (1846), p. 85. 



Mellisuga smaragdinis, Gray, Gen. Birds, vol. i, p. 113, sp. 52 (1844-49). 



Cynanthus smargdicaudus, Godld, Mod. Troch., vol. iii, pi. 173. 



Cynanthus mocoa, Bon., Consp. Gen. Av. (1850), vol. i, p. 81. — Gould, Intr. Troch., octavo ed., p. 103 (1861). 



— Taczanow., p. Z. S. (1874), p. .544.— Muls., Hist. Nat. Ois. Mouch., torn, iii, p. 271 (1876). 

 Leshia mocoa, Reich., Aufz. der Colib., p. 8 (1853). — Id., 'I'roch. Enuni. p. 5, pi. 717, tigs. 4C26-27. — Bon., Kev. 



and Mag. Zool. (18.54), p. 2.52.— Cab. and Hein., Mus. Hein. (1860) Th., iii, p. 71. 



Ilah. Ecuador, Peru, and Bolivia. 



Male. Crown brilliant metallic-green. Plumage of the body bronze-green, inclin- 

 ing to a brownish hue on the lower surface. A metallic-blue spot on the centre of 

 the throat. Wings purplish-brown. Basal half of rectrices black, remaining por- 

 tion brilliant metallic-green. Boliind the eye a minute white spot. Under tail 

 coverts grass-green. Bill and feet black. Total length, 7^ in. Wing, 2f in. Tail, 

 5 in. Culmen, -r^ in. 



' 1 b 



Fenmle. Crown shining green, not so luminous as the males. Upper surface 

 golden-bronze. Throat grayish-white, each feather tipped with white. Under 

 surface rufous, washed with green on the flanks. Central rectrices metallic-green; 

 lateral ones black tipped with white. Wings purplish-brown. Bill black. Total 

 length, 3| in. Wing, 2^ in. Tail, 1| in. Culmen, i in. 



