424 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 
Uranomitra quadricolor Exior, Classif. and Synop. Troch., 1879, 196.—Bzr- 
LepscH, Proc. U. 8. Nat. Mus., xi, 1889, 561 (crit.).—Lantz, Trans. Kansas 
Ac. Sci. for 1896-97 (1899), 221 (Culiacén, Sinaloa). 
Cyanomya (Leucolia) quadricolor Mutsanr and Verreaux, Hist. Nat. Ois.- 
Mouch., iv, livr. 3, 1878, 169 (crit.). 
Leucolia quadricolor Mutsant and Verreavx, Classif. Troch., 1866, 31; Hist. 
Nat. Ois.-Mouch., i, livr. 3, 1874, 215 (Orizaba). 
[Polytmus] quadricolor Gray, Hand-list, i, 1869, 133, no. 1710. 
U[ranomitra] elliott BertEerscu, Proc. U. 8. Nat. Mus., xi, Sept. 25, 1889, 562, 
in text (Mazatlén, Sinaloa; coll. U. S8. Nat. Mus.). 
Cyanomyia ellioti Jouy, Proc. U. 8. Nat. Mus., xvi, Apr. 18, 1894, 784 (Guadala- 
jara, Lake Chapala, and Barranca Ibarra, Jalisco). 
AMIZILIS VIOLICEPS (Gould). 
VIOLET-CROWNED HUMMING BIRD. 
Adult male—Pileum bright metallic blue, violet-blue, or bluish 
violet; “hindneck, upper back, scapulars, and wing-coverts dull 
metallic bronze-green, becoming brighter green or bronze-green next 
to white of foreneck, passing into olive glossed with bronze or bronze- 
green on lower back and rump, the feathers of which are indistinctly 
margined terminally with paler; upper tail-coverts bronzy olive to 
dull coppery bronze, margined terminally with dull whitish or pale 
dull grayish buffy; tail olive-bronze to coppery bronze, the rectrices 
margined with bronze; remiges dusky, faintly glossed with violet; 
suborbital, rictal, and malar regions and under parts (including under 
tail-coverts) immaculate white, the extreme outer portion of sides 
brownish gray or drab; bill pale brownish (rosy or carmine red in 
life), the tip dusky; iris dark brown; feet dusky; length (skins), 
101-109 (104); wing, 56-60 (58.5); tail, 31-85 (383.4); culmen, 
20.5-23.5 (21.6).¢ 
Adult female——Similar to the adult male and not always distin- 
guishable, but usually slightly duller in coloration, especially the 
pileum, which is usually duller and less violaceous, sometimes partly 
greenish blue; length (skins), 100-107 (104); wing, 54.5-59.5 (57); 
tail, 31-83 (82.3); culmen, 21.5-23.5 (22.4).® 
Young.—Essentially like adults, but pileum dusky or duller blue, 
the feathers tipped with rusty brown, feathers of rump tipped with 
buffy, upper tail-coverts margined with buffy, rectrices narrowly 
tipped with buffy or pale cinnamon, and sides suffused with buffy. 
Southern Mexico, in States of Puebla (Atlixco), Morelos (Cuerna- 
vaca; Puenta de Ixtla), Michoacén (La Salada), Guerrero (Chilpan- 
cingo; Acahuitzotla; Iguala; Venta de Zopilote; Sierra Madre del 
Sur), and Oaxaca (Putla; Oaxaca; Santa Efigénia; Tapana). 
Cyanomyia violiceps Goutp, Ann. and Mag. N. H., 1859, iv, 97 (Atlixco, Puebla; 
coll. J. Gould); Mon. Troch., v, 1860, pl. 285; Introd. Troch., oct. ed., 1861, 
147.—SciaterR, Proc. Zool. Soc. Lond., 1859, 386 (Ailixco).—D’Oca, La 
« Sixteen specimens. b Five specimens. 
