ETJCEPHALA. , 227 



1. Basilinna leucotis. 



Trochilus leucotis, Vieill., Nonv. Diet. Hist. Nat., 2d ed. t. xxii, p. 428. — Eiicy. M6th., vol. ii, p. 559. 



Trochilus mdanotis, SwaIn., Phil. Mag. (1827), p. 441. 



Ornismya arsenii. Less., Ois. Moucli., p. 60, pi. 9 (1829). 



N_i/locharis leucotis. Gray. Gen. Birds, vol. i, p. 114, sp. 28. 



Basilinna leucoti, Boie, Isis (1831), p. 546. — Kkichen., Aufz. der Colib., p. 13 (1S53). — Id., Trocli. Enuin., p. 



11 (1855). — Cab. and Heix., Mus. Heiii. Th., iii, p. 45. 

 ndiopoEdii-a melanotis, Goui.d, Mom. 'I'rocb., vol. ii, pi. 64. — Id., Intr. Troch., octavo ed., p. 60 (1861). 

 Thaumatias leucotis, Bon., Consp. Gcti. Av., p. 78 (1850). 

 Sapphironia hicida, Sclat., P. Z. S. (1858), p. 297, and (1859), p. 386. 

 Cmligena leucotis, Muls., Hist. Nat. Ois. Mouch., torn, i, p. 187. 



nuh. Mexico and Guatemala. 



Male. Front and chin sapphire-blue. Occiput bronze. Upper parts grass-green 

 on back shading into bronze on the rump. Throat and breast metallic emerald- 

 green. Ear coverts black; a white line above and bcliind the eye. Abdomen and 

 under tail coverts grayish-brown. Wings purple. Median rectrices bronze-green, 

 rest black with bronze edges and tips. Bill red, with black tips. Total length, 3,f 

 in. Wing, 2.^ in. Tail, 1;^ in. Culmen, | in. 



Female. Feathers of the crown rufous, margined with dark brown. Under sur- 

 face bufFy-white spotted with green. Rectrices like the male, but the lateral ones 

 are tipped with grayi-sh-white. Bill black. 



2. Basilinna santhusi. 



Amazilin xanthusi, Lawr., Ann. Lye. Nat. Hist., N. Y. (18G0), p. 109 ?. 



Hdinpailica castaneo-cauda, Lawr., Ann. Lye. Nat. Hist., N. Y. (1800), p. 145. %. 



Hdiopcexlica xanthusi, GofLD, Mon. Troch., vol. ii, pi. 04.— Id., Intr. Troch., octavo ed., p. 00 (1801). — Eluot, 



B. N. Amer., vol. i, pi. 22 (18ii9). 

 Cailigena xanthusi, Mui-s., Hist. Nat. Ois. Mouch., torn, i, p. 190. 



Hah. Cape St. Lucas, California. 



Male. Differs from the B. leucotis, in liaving the under parts rufous ; throat pale 

 grass-green; and tail darii chestnut tipped with bronze. Bill red, tip black. Total 

 length, 3g in. Wing, 2g in. Tail, Ig in. Culmen, ^ in. 



Female or youwj male. Upper parts shining green. Front and entire under parts 

 uniform rufous. Median rectrices green, lateral rufous with black spots on the 

 webs near the tips. 



One of the least understood of the various groups composing the Trochilidir is 

 tliat one forming the genus Eucephala, and this arises mainly from the great rarity 

 of the majority of the birds, for six of the types I believe, out of the uiiie known 

 species, still remain unique. — They are small birds, the prevailing tints of wliose 

 plumage is metallic-blue and green ; the females differing greatly from the males 

 in appearance. 



Genus CXI.— EUCEPII.\LA. 



Ttpr. 



Eucephala, REirn., Anfz. dor Ccilihri. (1S53), p. 10. T. grayi. Pelatt. and Bourc. 



Chlorestes, Reich., Aufz. der Colib., p. 7 (ls53). T. cyanogenys, Wicd. 



