BIRDS OF NORTH AND MIDDLE AMERICA. 425 



Naturaleza, iii, 1875, 208; Troq. de Mex., 1875, 50.— Lawrence, Bull. U. S. 

 Nat. Mus., no. 4, 1870, 32 (Tapana and Sta. Efigenia, Oaxaca). — Elliot, Ibis, 

 1876, 313 (Oaxaca; synon.; crit.). — Sanchez, An. Mus. Nac. Mex., i, 1877, 

 96 (Oaxaca).— Salvin, Cat. Birds Brit. Mus., xvi, 1892, 196 (Chilpancingo, 

 Venta de Zopilote, and Sierra Madre del Sur, Guerrero; Atlixco, Puebla; 

 Oaxaca). — Salvin and Godman, Biol. Centr.-Am., Aves, ii, 1892, 288. — 

 JouY, Proc. U. S. Nat. Mus., xvi, 1894, 784 (Cuernavaca, Morelos).— Bou- 

 CARD, Gen. Hum. Birds, 1894, 164 (Oaxaca). 



[Cyanonuja] rioliceps Mulsant, Ann. Soc. Linn. Lyon, xxii, 1876, 204. 



Cyanomya violkeps Boucard, Ann. Soc. Linn. Lyon, xx, 1874, 276 (Cuernavaca, 

 Morelos; Atlixco, Puebla; Oaxaca; habits); Notes quelques Troch., 1873, 8 

 (Cuernavaca; Atlixco; Oaxaca; habits). — Sumichrast, La Naturaleza, v, 

 1881, 250 (Sta. Efigenia and Tapana). 



[Cyanomyia] violkeps Sclater and Salvin, Nom. Av. Neotr., 1873, 91. 



Cianomyia violkeps D'Oca, Los Colibris Mex., 1875, pi. 10, fig. 38. 



Cyanomya (Leucolia) violiceps Mulsant and Verreaux, Hist. Nat. Ois.-Mouch., 

 iv, iivr. 3, 1878, 170 (crit.). 



U[ranomitra] violiceps Cabanis and Heine, Mus. Hein., iii, 1860, 41, footnote 

 (Oaxaca). 



Uranomitra rioliceps Elliot, Classif. and Synop. Troch., 1879, 196. 



Leucolia violiceps Mulsant and Verreaux, Classif. Troch., 1866, 31; Hist. Nat, 

 Ois.-Mouch., i, Iivr. 3, 1874, 213 (Puebla; Oaxaca; Morelos). 



[Polytmus] violkeps Gray, Hand-list, i, 1809, 133, no. 1711. 



A[mazilia] violiceps Hartert, Das Tierreich, Troch., 1900, 62 (monogr.). 



[Amazilia] violiceps Sharpe, Hand-list, ii, 1900, 109. 



AMIZILIS CYANOCEPHALA CYANOCEPHALA (Lesson). 



RED-BILLED AZURE-CROWN. 



Adiilt male. — Pileiim bright metallic blue (varying from slightly- 

 violet blue to greenish blue); hinclneck, back, scapulars, and wing- 

 coverts metallic bronze-green, passing on rump, upper tail-coverts, 

 and tail into olive faintly glossed with greenish bronze or bronze- 

 green, the nape sometimes tinged with blue, the upper tail-coverts 

 usually narrow^ or indistinctly margmed with i)aler; remiges dusky, 

 faintly glossed with purplish; rictal and suborbital regions metallic 

 bluish emerald-green, the feathers narrowly marghied with white; 

 auricular region and sides of neck mostly metallic bluish green, less 

 bluish posteriorly; sides of chest metalhc bronze-green, the feathers 

 usually narrowly margined with white, passing into duller bronze- 

 green or olive glossed with bronze-green or greenish bronze; chin, 

 throat, malar region, median portion of chest and breast, abdomen, 

 and femoral tufts immaculate white; under tail-coverts olive-gray, 

 famtly glossed with bronze and margined with white; maxilla dull 

 black; mandible whitish (carmine red in life), blackish at tip; iris 

 dark brown; feet dusky or blackish; length (skins), 96-106 (101); 

 wing, 57.5-62 (59.7); tail, 31-34.5 (33.2); culmen, 19-22 (20.3).« 



Adult female. — Similar to the adult male and not always distin- 

 guishable, but usually with blue of pileum slightly less brilUant or 



« Ten specimens. 



