Genera of Humming Birds. 261 



tufts white. Undertail-coverts shining bluish-green. Wings 

 purplish. Bill black. 



Total length, 4|-in. Wings, 2|. Tail, 2|. Culmen, f. 



This rare species was discovered in Colombia, by Delattre, 

 and dedicated by him and Bourcier, to General Mosquera, 

 then President of the Republic of Colombia. 



373. Eriocxemis isaacsoni, Parz. Rev. Zool., 1845, p. 95. 



HylocJiaris isaacsoni, Gray, Gen. Birds, vol. i., p. 114. 



Eriopiis isaacsoni, Bon. Consp. Gen. Av., 1850, p. 80. 



Eriocnemis isaacsoni, Bon. Rev. and Mag. Zool., 1854., 

 p. 52. 



Phemonoe isaacsoni, Reich., Aufz. der Colib., 1853, p. 9. 



Helianthea isaacsoni, Elliot, Ibis. 1874, p. 331. 



Saturia isaacsoni, Muls. Hist. Nat. Ois. Mou., 1876, t. ii., 

 p. 299. 



Long-billed Puff-leg, Gould, Mon. Troch., vol. iv., p. 272. 



la Satiirie cT Isaacson, Muls. Hist. Nat. Ois. Mou., 1876, 

 t. ii., p. 300. 



Habitat. — Colombia. 



Male. — Upper part of head dark metallic green ; a small 

 spot of very luminous light grass-green upon the forehead. 

 Back grass-green, inclined to bronze in certain lights. Wings 

 like the back ; primaries purplish-brown. Rump and upper- 

 tail-coverts brilliant metallic grass-green. Entire throat 

 brilliant metallic grass-green. Breast metallic green, lighter 

 than the throat. Rest of underparts metallic coppery-bronze, 

 changing in certain lights to red upon the abdomen. Under- 

 tail-coverts brilliant grass-green. Tail brownish-black with 

 a purple shade. Bill black. Tarsi covered with short white 

 feathers. 



Total length, 4|in. Wing, 2|. Tail, 2. Culmen, i. 



This extremely rare species, dedicated by Parzudaki to Mr. 

 Isaacson, is only represented in the Collections by three 

 specimens, one the type, " Ex Elliot Collection," is now in the 

 New York Museum of Natural History, the second one is in 

 the Liverpool Museum, and the ihird in my Collection. 



