196 Field Museum of Natural History — Zoology, Vol. XIII. 



Basilinna leucotis Salvin, Cat. Bds. Brit. Mus., XVI, 1892, p. 252; Am. Orn. 



Union Check List, 2nd ed., 1895, p. 206 (except Nicaragua). 

 Heliopaedica melanotis Gould, Mon. Trochil., II, (pt. XV, 1858), pi. 64. 

 Basilinna leucotis leucotis Ridgway, Bull. U. S. Nat. Mus., No. 50, V, 191 1, p. 378. 



Range: Mountains of southeastern Arizona, south through high- 

 lands of Mexico to Guatemala. 



6: Mexico (Oaxaca i, "Mexico" 2); Guatemala (Lake Atitlan 2, 

 Tecpam i). 



*Basilinna leucotis pygmaea Simon and Hellmayr. Lesser White- 

 eared Humming Bird. 

 Basilinna leucotis pygmaea Simon and Hellmayr, Nov. Zool., XV, 1908, p. 12 

 (Matagalpa, Nicaragua); Ridgway, Bull. U. S. Nat. Mus., No. 50, V, 19H, 

 p. 381. 

 Range: Nicaragua. 

 i: Nicaragua (Jinotiga). 



*Basilinna xantusii {Lawrence). Xantus's Humming Bird. 



Amazilia xantusii Lawrence, Ann. Lye. Nat. Hist. N. Y., VII, i860, p. 109 



(Cape San Lucas). 

 Heliopaedica xantusi Gould, Mon. Trochil., II, 1861, pi. 65. 

 Heliopaedica castaneocauda Elliot, lUust. Bds. N. Am., I, 1869, pi. 22. 

 Basilinna xantusi — Am. Orn. Union Check List, 3rd Ed., 1910, p. 206; Salvin, 



Cat. Bds. Brit. Mus., XVI, 1892, p. 255; Brewster, Bull. Mus. Comp. Zool., 



XLI, 1902, p. 112. 

 Basilinna xantusii Ridgway, Bull. U. S. Nat. Mus. ,No. 50, V, 191 1, p. 382. 



Range: Southern Lower California, rarely north to about latitude 



o 



29 . 



3: Lower California (La Paz 3, Cocachiles Mts. i). 



Genus HYLOCHARIS^ Boie. 



Hylocharis Boie, Isis, 1 831, p. 546 (Type Trochilus saphirinus Gmelin). 



*Hylocharis grayi {Delattre and Bourcier). Blue-headed Sapphire. 



Trochilus grayi Delattre and Bourcier, Rev. Zool., 1846, p. 307 (Popayan). 

 Eucephala grayi Gould, Mon. Trochil., V, 1861, pi. 330; Elliot, Syn. Trochil., 



1879, P- 228; Salvin, Cat. Bds. Brit. Mus., XVI, 1892, p. 239. 

 Hylocharis grayi Oberholser, Proc. U. S. Nat. Mus., XXIV, 1902, p. 317 



(Northern Ecuador and southern Colombia); Chapman, Bull. Am. Mus. 



N. H., XXXVI, 1917, p. 289 (Cauca Valley, Colombia and southward to 



northern Ecuador). 



Range: Southern Colombia and northern Ecuador. 



4: Ecuador (Gualea i, "Ecuador" 2); Colombia (Cali i). 



• I cannot find any structural differences to distinguish the Genus Eucephala Reich., 

 1854, from Hylocharis and have followed Hartert and Oberholser in uniting them. 



