678 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



long. In case two genera are recognized P. conversi and its allies 

 would constitute a genus the earliest name for which appears to be 

 Gouldomyia Bonaparte (1854). 



KEY TO THE SPECIES AND SUBSPECIES OF POPELAIRIA. 



a. Tail excessively forked, the lateral rectrices slenderly attenuate; no white on head 

 nor anterior under parts. {Adult inale.) 

 h. Conspicuously crested; thighs cinnamon-rufous. (Colombia to Peru.) 



Popelairia popelairii, adult male (extralimital).« 

 hh. Without crest; thighs not cinnamon-rufous. 

 c. No white pectoral spot; rectrices blue-black or dark steel blue, the lateral ones 

 more than 40 mm. long, their shafts white beneath. 

 d. Flanks metallic green; only center of breast black, the feathers tipped with 

 metallic green or blue; throat and chest metallic grass-green; lateral rec- 

 trices strongly doubly curved. {Popelairia conversi.) 

 e. Feathers of center of breast tipped with green; upper tail-coverts dark 

 metallic green; wing 41-43.5 (42.6), tail 54.5-56.5 (55.2). (Central 



Colombia.) Popelairia conversii conversii, adult male (extralimital).^ 



ee. Feathers on center of breast tipijed with bluish green or greenish blue; 

 upper tail-coverts dark bronzy (at least in part); wing, 40-43 (41.4); 

 tail, 46-61 (56.6). (Costa Rica to western Ecuador.) 



Popelairia conversii aequatorialls, adult male (j). 679). 

 dd. Flanks pale brownish gray; whole breast uniform black; throat and chest 

 metallic yellowish green; lateral rectrices curved outwardly only. 



Popelairia langsdorffi, adult male (extralimital).c 



a Trochilus popelairii Du Bus, Esquis. Orn., livr. 2, 1846, pi. 6, and text (Peru; coll. 

 Royal Mus. Belgium). — [Gouldia] popelairii Bonaparte, Consp. Av., i, 1850, 86.— 

 Gouldia popelairii Gould, Mon. Troch., iii, 1854, pi. 127; Elliot, Classif. and Synop. 

 Troch., 1879, 138. — P[rym.nacantha] popelairei Cabanis and Heine, Mus. Hein., iii, 

 1860, 64. — Prymnacantha popelairei Gould, Introd. Troch., oct. ed., 1861, 86; Salvin, 

 Cat. Birds Brit. Mus., xvi, 1891, 42S .— T[richolopha] popelairei Heine, Journ. fiir Orn., 

 1863, 209, in tex.t.— Popelairia tricholopha Reichenbach, Aufz. der Colibr., 1854, 12; 

 Troch. Enum., 1855, 9, pi. 815, figs. 4905-4907 .—Popelaria tricholopha Ridgway, Proc. 

 U. S. Nat. Mus., iii, Oct. 27, 1880, 315 {Colomhia) .—[Popclairea] popelairei Sharpe, 

 Hand-list, ii, 1900, 144. 



b T[rochilus] conversii Bourcier and Mulsant, Ann. Sci. Phys. et Nat., etc., Lyon, ix, 

 1846, 313 (Bogota, Colomhia) .—[Gouldia] conversi Bonaparte, Consp. Av., i, 1850, 86; 

 Gould, Mon. Troch., iii, 1854, pi. 129; Introd. Troch., oct. ed., 1861, 86; Elliot, 

 Classif. and Synop. Troch., 1879, 139, ipsirt. —P[rymnacantha] conversi Cabanis and 

 Heine, Mus. Hein., iii, 1860, 65.— Prymnacantha conversi Salvin, Cat. Birds Brit. 

 Mus., xvi, 1891, 430, Tpart. —Mellisuga conversi Mulsant and Verreaux, Classif. Troch., 

 1866, 79.— [Popelairea] conversi Simon, Cat. Troch., 1897, 41.— P[opelairea] conversi 

 {typica) Hartert, Das Tierreich, Troch., 1900, 223. 



c Trochilus langsdorffi "Vieill [ot]" Temminck, Nouv. Rec. Planches Coloriees, iv, 

 livr. 11, June, 1821, pi. 66, fig. 1 (Brazil; coll. Langsdorff ).—0rn{s?7??/a langsdorffi 

 Lesson, Hist. Nat. Ois.-Mouch., 1829, pp. xx, 102, pi. 26; Suppl. Ois.-Mouch., 1830-31, 

 129, pi. 16; Les Troch., 1832, 101, pi. 35.—Orthorhynchus langsdorffi Lesson, Man. 

 d'Orn., ii, 1828, 77 .—[Gouldia] langsdorffi Bonaparte, Consp. Av., i, 1850, 86.— Gouldia 

 langsdorffi Gould, Mon. Troch., iii, 1854, pi. 128; Introd. Troch., oct. ed., 1861, 86; 

 Elliot, Classif. and Synop. Troch., 1879, \Z8.—P[rymnacantha'] langsdorffi Cabanis and 

 Heine, Mus. Hein., iii, 1860, 65.— Prymnacantha langsdorffi Mulsant and Verreaux, 



