Geneia of Humming Birds. 127 



Total length, 4|in. Wing, if. Tail, 2. Culmen, \. 

 Female. — Unknown. 



Type unique in the Vienna Zoological Museum. 

 It has been discovered by Mr. Natterer. 



GENUS LVII. Prasitis, Cab., and Heine, Mus. Hein., 



i860, t. iii., p. 49. 



TYPE : O. prasina, Lesson. 



Bill slightly longer than the head, straight and acutely 

 pointed, all black. Wings narrow and long. Tail short, very 

 slightly forked or even. Rectrices wide. Feet small. Tarsi 

 clothed. Sexes unlike. 



Habitat. — Veragua, Panama, Columbia, Venezuela, Guiana, 

 Trinidad, Ecuador and Peru. 



177. Prasitis prasina, Less, Ois. Mou., pp. 35- 188, pi. 65. 



Hylocharis prasinus, Bon. Consp. Gen. Av., 1850, vol. i., 

 p. 74. 



Chlorestes prasina, Reich., Aufz. der Col., 1853, p. 7. 



Prasitis prasina, Cab. and Heine., Mus. Hein., i860, t. iii., 

 p. 49. 



Chlorostilbon prasinus, Elliot, Ibis., 1875, p. 163. 



Chrysomirus prasinus, Muls., Hist. Nat. Ois. Mou., 1875, 

 t. ii., p. 108. 



Chlorostilbon subfurcatus, Salv. Berl., Ibis., 1887, p. 297. 



Guiana Emerald. 



Le Chrysomire Orvert, Muls., Hist. Nat. Ois. Mou., 1875, 

 t. ii., p. 109. 



Habitat. — Guiana. 



Male. — Crown metallic golden-green. Rest of upperside 

 bronze-green. Uppertail-coverts green. Throat and upper 

 part of breast metallic emerald - green, with bluish hue. 

 Abdomen and flanks metallic golden-green. Wings purplish- 

 brown. Tail blue-black, nearly even. Bill black. 



Total length, 3iin. Wing, i-|. Tail, 1. Culmen, f. 



Female. — Upperside shining green, bronzy on head. Under- 

 side gray, washed with a few green feathers on sides of 



