Genera of Humming Birds. 65 



89. OxvPOGON CVA\OLAP:Mrs, Salv. and Godm., Ibis., 1880, 



p. 172. 

 Blitc-tliroated He! mct-crcst , (jould, Mon. Troch., Suppl., 

 1886, p. 3(S. 



i'Oxypoooii a gorge bleue. 



Habitat. Sierra Nevada, Santa Marta (Columbia). 



Male. — This species is closely allied to O. gucrini. The 

 principal differences are the throat, including its elongated 

 feathers, which are metallic purplish blue, with base of feathers 

 of chin white, followed by a metallic rubi spot, and the 

 outermost rectrices entirely white with bronzy tips. Bill and 

 feet black. 



Total length, 4^in. Wing, 2\. Tail, 1%. Culmen, |. 



Female. — Like the male, but without the crest and the 

 ornamental feathers of throat. 



It is a very rare species in the collections. It was discovered 

 by the traveller-naturalist, Mr. Simons, in Sierra Nevada of 

 Santa Marta (Columbia). 



c)o. O.WFOGON LIXDENI, Parz., Rev. Zool., 1845, p. 253. 



Mellisiiga lindeni, Gray, Gen. Birds, vol. i., p. 113. 



Linden's Helmet-crest, Gould, Mon. Troch, vol. iii., p. 183. 



rOxypogon de Linden, Muls. Hist. Nat. Ois. Mou., 1876, 

 t. iii., p. 182. 



Habitat. — Venezuela. 



Male. — Centre of forehead, head and crest velvety black, 

 with two narrow lines of white feathers starting from the bill 

 and uniting quickly with the elongated white feathers of crest. 

 Upperside bronze-green. Chin white, with black spots on 

 the central feathers, and a lengthened tuft of white feathers 

 reaching the lower part of breast. The black part surrounding 

 the chin is encircled by a band of white. AH the underside 

 pale bronzy-brown. Anal region and upper part of under- 

 tail coverts bluish-white, remainder of undertail coverts bronzy, 

 edged with white. Median rectrices bronzv-green, lateral 

 coppery -bronze. Shafts of rectrices white for nearly their 

 entire length. Wings purplish-brown. Bill and feet black. 



Total length, 4|[in. Wing, 3. Tail, 2%. Culmen, jf. 



Female. — Upperside bronzy-brown. Underside mottled 

 with white and coppery brown. Flanks copperv brown with 

 a ereen lustre. 



