BIRDS OF NORTH AND MIDDLE AMERICA. 679 



cc. A white pectoral spot; rectrices purplish black, their shafts rufous beneath," 

 the lateral ones less than 40 mm. (Bolivia.) 



Popelairia letitiae, adult male (extralimital).'' 

 aa. Tail slightly forked or double rounded, the lateral rectrices not attenuated; head 

 and anterior imder parts partly white. {Adult females.) 

 b. Thighs not rufescent; throat and chest not uniform sooty black. 



c. Thighs black Popelairia conversii aequatorialis, c adult female (p. 680). 



cc. Thighs white Popelairia langsdorffi, adult female (extralimital;. 



bb. Thighs rufescent; throat and chest uniform sooty blackish. 



Popelairia popelairii, adult female (extralimilal). 



POPELAIRIA CONVERSn iEQUATORIALIS (Berlepsch and Taczanowski). 



SALVIN'S THORN-TAIL. 



Adult male.— Above deep metallic green (brightest on j)ileuni), the 

 lower rump and shorter upper tail-coverts usually dark coppery 

 bronze or partly of this color; a narrow white band across upper 

 rump; tail slightly glossy blue-black, the shafts of the rectrices white 

 basally, passmg into brownish gray terminally, pure white for entire 

 length on under surface, the webs brownish gray immediately next 

 to shaft; remiges and primary coverts dusky, very faintly glossed 

 with purplish; chin, throat, and chest bright metallic grass green; 

 rest of under parts duller metallic green, the center of breast with a 

 patch of metallic bluish green or greenish blue, mtermixed centrally 

 with dark blue or bluish black; femoral tufts white; bill black; iris 

 dark brown; feet dusky; length (skins), 93-110 (104); wing, 40-43 



Hist. Nat. Ois.-Mouch., iii, 1877, 238, pi. 94; Salvin, Cat. Birds Brit. Mus., xvi, 1891, 

 429.— MeUisuga langsdorffi, Mulsant and Verreaux, Classif. Troch., 1866, 79. — Popelaria 

 langsdorffi Ridgway, Proc. U. S. Nat. Mus., iii, Oct. 27, 1880, 315 (Brazil; Pebas, 

 e. Peru). — P[opelairea] langsdorffi Hartert, Das Tierreich, Troch., 1900, 223. — 

 (?) Gouldia inelanosternon Gould, Ann. and Mag. N. H., ser. 4, i, May, 1SG8, 323 (Napo, 

 Pebas, and Ucayali, e. Peru; coll. J. Goidd). — [Trochilusi inelanosternon Gray, Hand- 

 list, i, 1869, 146, no. 1879. 



ff According to Elliot; but Salvin says they are white beneath. 



6 Trochilus letitix Bourcier and Mulsant, Ann. Sci. Phys. et Nat., etc., Lyon, iv, 

 1852, 143 (BoVwisi) .—[Gouldia] laetitia Reichenbach, Aufz. der Colibr., 1854, 12. — 

 Gouldia letitix Gould, Mon. Troch., iii, 1855, pi. 130; Introd. Troch., oct. ed., 1861, 

 86; Elliot, Classif. and Synop. Troch., 1879, 139. — I'lrynmacantha] laetitiac Cabanisand 

 Heine, Mus. Hein., iii, 1860, 64, footnote. — Mellisuga letitix. Mulsant and Verreaux, 

 Classif. Troch., 1866, 79. — Prijmnacantha letitix Salvin, Cat. Birds Brit. ]\lus., xvi, 

 1891, 431.— Mythinia letitix Mulsant and Verreaux, Hist. Nat. Ois.-Mouch., iii, 1877, 

 245. — [Myti7iia] letitix Mulsant, Ann. Soc. Linn. Lyon, xxii, 1876, 224. — F[opelairea] 

 letitiae Hartert, Das Tierreich, Troch., 1900, 224. 



c I have no females of P. c. conversii nor P. letitix for comparison. 



