202 



SYNOrSIS OF THE HUMMING-BIRDS. 



b. Crown of liead ilull green. 



a'. Under tail coverts white with central brown or green streak. 



a". Tail, median feathers except tips, and the basal 

 portions of the others, bright gi'ccn; central i)art 

 of lateral ones blackish, tips gra}'. Throat and 

 breast shining grass-green. 



b". Tail, median feathcr,s bronze-green, remainder black 

 with pale tips. Throat and breast golden-green. 



e". Tail black. Throat and breast grass-green, with a 

 slight bluish tinge. 



d". Tail, median feathers green, broadlj' tipped with 

 blue-black, rest black, tipped with white. Throat 

 and breast golden-green. 



e". Tail, median feathers green, tipped with black, next 

 one on either side bronze-green for two-thirds 

 their length, rest black; remaining feathers green 

 at base, then black with a metallic-green spot on 

 the tip which graduates into white on its upper 

 edge. 



f". Tail bronze-green, lateral feathers with a subtermi- 

 nal purplish-bronze bar, tips ashy-gray. Throat 

 and breast glittering bluish-green, 

 b'. Under tail coverts pure white. 



a". Tail, all the feathers steel-black, median ones slightly 

 tinged with green in certain lights. 



b". Tail, median pair of rectrices golden-green, remain- 

 ing ones have the inner webs, except tips, black; 

 outer webs metallic golden-green; all the lateral 

 feathers are tipped with bright metallic golden 

 green. 



13. J. iephrocephala. 



14. A. tobaci. 



15. A. fluvialilis. 



16. A. apicalis. 



A. maculicauda. 



18. A. lucise. 



19. A. nigricauda. 



20. A. nilidicauda. 



1. Agyrtria niveipectus. 



Thaumatias rlu'onopcctus, Godi.d, Mon. Troch, pt. xviii (18.59), pi. ,'j; vol. v, pi. 293. — Id., Iiitr. Trocb., octavo 



ctl., p. I.i2 (18G1).— Mri,s., Hist. Nat. Ois. Mouch., torn, i, p. 227.— Ei.uot, Ibis (1878), p. 40. 

 Agyrlria ■niveipcctua, Cab. antl Hkin., IMus. Ileiii. Th., iii, p. 33 (note 10) (1860). 

 Polyimus chionopectus, Leot., Ois. Trinid., p. 140, no. 71 (1866). 



ffcib. Trinidad, Venezuela, Guiana. 



Adult. Top of head and sides of neck glittering metallic-green. Upper surface 

 coppcry-grceir. Throat and centre of abdomen white; flanks golden-green. Under 

 tail coverts grayish with whitish margins. Tail purplish-bronze, with a subterminal 

 purplish-brown bar. Bill and feet black. Total length, 3j in. Wing, 2 in. Tail, 

 1:5 in. Culmen, f in. 



2. Agyrtria leucogaster. 



Troclu'tus leucogaster, G.mel., Syst. Nat. (1788), vol. i, p. 49.5. 



Ornismya albirostn's, Less., Ois. Mouch., p. 212, pi. 78 (1829). 



Tliaumantias leucogaster, Bon., Eev. and Mag. Zool. (18.54), p. 2.55. 



Tliaumatias mellisuga, Bon., Consp. Gen. Av., vol. i, p. 78 (1850). 



Agyrtria Icucogastra, Reich., Aufz. der Colib., p. 10 (1853). — Id., Trocli. Enuni., p. 7, pi. 762, figs. 4762-64 



(185.5).— Cab. and Hein., Mus. Hcin. Th., iii, p. 34 (1860). 

 Tliaumatias leucogaster, Gould, Mon. Troch., vol. v, pi. 294. — Id., Intr. Troch., octavo cd., p. 152 (1861).— 



Muls., Hist. Nat. Ois. Mouch., torn, i, p. 231.— Elliot, Ibis (1878), p. 41. 



