44 SYNOPSIS OF THE HUMMING-BIRDS. 



These birds are characterized by a rather stout form, slender curved bills, metallic 

 green breast and black abdomens. 



1. Lafresnaya flavicaudata. 



Trochilus Lafresnayi, Boisson, Rev. Zool. (1840), p. 8 (January). 



Trochilusflavicaudatus, Fras., P. Z. S. (1840), p. 18 (February). 



Calothorax Lafresnayi, Gray, Gen. Birds, vol. i, p. 110. 



Lafresnaya Jlavicaudatas, Bon., Consp. Geu. Av., vol. i, p. 68 (1850). 



Lafresnaya Jlavicaudata, Reich., Aufz. der Colib. (18,')3), p. 11. — Id., Trocli. Enum., p. 8, pi. 785, figs. 4824-25. 



— Goui.D, Mon. 'i'roch., vol. ii, pi. 85. — -Id., liitr. Tiocli., octavo cd., p. 69 — Bon., Rev. and Mag. Zool. 



(18.54), p. 2.52. 

 Entima Lafresnayi, Cab. and IIein., Mus. Ilein. Th., iii, p. 51 (1860). 

 Eudosia Lafresnaya, Mui.s., Hist. Nit. Trocli., vol. ii, p. 187. 



Hab. Columbia. 



Male. Entire upper parts dark grass-green. Wings purplish-brown. Throat, 

 breast, and flanks metallic grass-green ; abdomen black. Median rectrices shining 

 bronze-green. Lateral feathers bufl', margined and tipped with bronzy-brown. 

 Under tail coverts buff, tipped with bronze-green. Bill black. Total length, 4i\ in. 

 Wing, 'l\ in. Tail, \\ in. Culmen, 1 in. 



Female has under surface deep buff", spotted on the throat with green. Flanks 

 green ; whitish on abdomen. Rest like the male. 



2. Lafresnaya gayi. 



Trochilus gayi, Bourc. and Mii.s., Ann. Soc. d'Agr.. Lyon (1846), p. 325. 



Trochiius satda; Bourc. and Dei.att., Rev. Zool. (184G), p. 309. 



Calothorax gayi, Gray, Gen. Birds, vol. i, p. 110, sp. 2. 



Calothorax satdce. Gray, Gen. Birds, vol. i, p. 110, sp. 3. 



Lafresnaya gayi, Bon., Consp. Gen. Av., vol. i, p. 68.— Reich., Aufz. der Colib., p. 11. — Id., Troch. Enum., p. 



8, t. 786, fig. 4826-27.— BoN., Rev. and Mag. Zool. (1854), p. 252.— Gould, Mon. Troch., vol. ii, pi. 86.— 



Id., Intr. Troch., octavo ed., p. 69. 

 Lafresnaya saxdee, Bon., Consp. Av., vol. i, p. 68.— Reich., Aufz. der Colib., p. 11. — Id., Troch. Enum., p. 8, 



t. 786, fig. 4828-29.— Goui.D, Intr. Troch., octavo ed.,*p. 70. 

 Entima gayi, Cab. and Hein , Mus. Hein. Th., iii, p. 51 (1860). 

 Eudosia gayi, Mui.s., Hist. Nat. Troch., vol. ii, p. 190. 



Hab. Venezuela and Ecuador. 



Male. Precisely like the L. Jlavicaudata, except that the lateral rectrices are 

 white tipped with black or greenish-bronze, and the under tail coverts are also 

 white tipped with green. Dimensions the same. 



Female has the under surface white spangled with green, rest like the male. 

 The L. saula, Bourc, cannot be separated from the present species. Bourcicr's 

 types are in my collection, and I can see no difference whatever between them and 

 specimens of L. fjayi. The coloring of the tips of the rectrices varies, and evidently 

 is not a specific character. The species inhabits Venezuela and Ecuador, having 

 rather oddly the L. Jlavicaudata dwelling in Columbia, just between these two 

 localities. 



The Chaltbur^ are distinguished from all known Humming-birds by the great 

 development of their plume-like under tail coverts, which peculiarity is observed 



