8 SYNOPSIS OF THE HUMMING-BIRDS. 



outermost feather. Lores and auriculars brown. Chin and throat black, bordered 

 on each side by a line of white. A band of reddish-buff crosses the lower part of 

 the throat. Breast and flanks shining green, abdomen grayish-buff. Under tail 

 coverts olive-green margined narrowly with buff. Maxilla black, mandible flesh- 

 color, tip black. Total length, 4| in. Wing, 21 in. Tail, 1| in. Culmen, 1 in. 



5. G-laucis cervinicauda. 



Tlirencfes cervimcauda, GouLn, P. Z. S. (lfi.')4), p. 109.— Id., Moii. Troch., vol. i, p]. 1-4.— Id., Intr. Troch. 

 octavo ed., p. 40.— Salv. and Elliot, Ibis (1873), p. 278. 



ITah. Upper Amazon, Ecuador, Columbia. 



This species is almost precisely the same as the preceding, and it is rather 

 difficult to tell them apart. The chief and only difference is that the tail of this 

 bird is buff, where the other is white, but I have specimens from Surinam of G. 

 leucums, which also have buff on the rectrices. I think that with a sufficiently 

 large series of specimens to enable a satisfactory opinion to be formed, it will be 

 found that individuals of the two species, as usually considered, are in reality but 

 representatives of a single one, with a wide dispersion. Total length, 5 in. Wing, 

 2| in. Tail, 1^ in. Culmen, 1| in. 



6. Glaucis nickeri. 



Trochilus ruckeri, Bourc, P. Z. S. (1847), p. 46. 



Poli/f.mus ruckeri, Gray, Gen. Birds, vol. i, p. 108. 



Threnctes ruckeri, Reich., Aufz. Colib., p. 15. — Id., Troch. Enum., p. 12. — Bon., Rev. and Mag. Zool. (1854), 



p. 249. 

 Glaucis ruckeri, Gould, Mon. Troeli., vol. i, pi. 11. — Id., Intr. Troch., octavo ed.,p. 40. — Cab. and IIei.v., Mus. 



Hein. Th., iii, p. 4 (note 3) (1860).— Salv. and Elliot, Ibis (1873), p. 278.— MnLs., Eist. Nat. Ois. 



Mouch., torn, i, p. 47. 

 Glaucis fraseri, Gould, Mon. Troch.. vol. i. pi. 12. — Id., Intr. Troch., octavo ed., p. 40 (1861). 



Hah. Central America, Ecuador. 



Upper parts shining green, brown on the head ; upper tail feathers margined 

 with buff. AVings purple. Chin and upper part of throat blackish-brown ; lower 

 part bright rufous, a buffy stripe behind the eye, another below. Lores and ear- 

 coverts black. Under surface brownish-gray ; under tail coverts bronzy-green. 

 Median rectrices shining green tipped with white, remainder AA'hite, with a very 

 broad subterminal black bar. Maxilla black, mandible flesh-color, tip black. Total 

 length, 4i\ in. Wing, \\ in. Tail, !§ in. Culmen, 1^ in. Some examples are 

 bright bronze-green above, and they seem to vary in color on the upper parts as is 

 observed among specimens of G. hirsuta. 



Genus v.— DOLEROMYA. 



Type. 

 Doleromya, Bon., Rev. and Mag. Zool. (1854), p. 249. T.falhu; Bourc. 



Dolerisca, Cab. and Hein., Mus. Hein. (I860), Th., iii, p. 6. T.fallax, Bourc. 



