BIRDS OF NORTH AND MIDDLE AMERICA. 425 
Naturaleza, iii, 1875, 208; Troq. de Mex., 1875, 50.—Lawrencez, Bull. U.§. 
Nat. Mus., no. 4, 1876, 32 (Tapana and Sta. Efigénia, Oaxaca),—Eio7, Ibis, 
1876, 313 (Oaxaca; synon.; crit.)—Sancwez, An. Mus. Nac. Mex., i, 1877, 
96 (Oaxaca).—Satvin, Cat. Birds Brit. Mus., xvi, 1892, 196 (Chilpancingo, 
Venta de Zopilote, and Sierra Madre del Sur, Guerrero; Atlixco, Puebla; 
Oaxaca).—Satvin and Gopman, Biol. Centr.-Am., Aves, ii, 1892, 288.— 
Jouy, Proc. U. S. Nat. Mus., xvi, 1894, 784 (Cuernavaca, Morelos).—Bov- 
CARD, Gen. Hum. Birds, 1894, 164 (Oaxaca). 
[Cyanomya] violiceps Mutsant, Ann. Soc. Linn. Lyon, xxii, 1876, 204. 
Cyanomya violiceps Boucarp, Ann. Soc. Linn. Lyon, xx, 1874, 276 (Cuernavaca, 
Morelos; Atlixco, Puebla; Oaxaca; habits); Notes quelques Troch., 1873, 8 
(Cuernavaca; Atlixco; Oaxaca; habits)—Sumicurast, La Naturaleza, v, 
1881, 250 (Sta. Efigénia and Tapana). 
[Cyanomyia] violiceps ScLaTER and Satvin, Nom. Av. Neotr., 1873, 91. 
Cianomyia violiceps D’Oca, Los Colibris Mex., 1875, pl. 10, fig. 38. 
Cyanomya (Leucolia) violiceps MutsanT and Verreavx, Hist. Nat. Ois.-Mouch., 
iv, livr. 3, 1878, 170 (crit.). 
U[ranomitra] violiceps CaBanis and Hertnz, Mus. Hein., iii, 1860, 41, footnote 
(Oaxaca). 
Uranomitra violiceps Eviiot, Classif. and Synop. Troch., 1879, 196. 
Leucolia violiceps Mutsant and VERREAUX, Classif. Troch., 1866, 31; Hist. Nat. 
Ois.-Mouch., i, livr. 3, 1874, 218 (Puebla; Oaxaca; Morelos). 
[Polytmus] violiceps Gray, Hand-list, i, 1869, 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. 
Adult male—Pileum bright metallic blue (varying from slightly 
violet blue to greenish blue); hindneck, 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 narrowly or indistinctly margined with paler; remiges dusky, 
faintly glossed with purplish; rictal and suborbital regions metallic 
bluish emerald-green, the feathers narrowly margined with white; 
auricular region and sides of neck mostly metallic bluish green, less 
bluish posteriorly; sides of chest metallic 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, 
faintly 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 brilliant or 
@Ten specimens. 
