3i8 Genera of Humming Birds. 



Total length, 4^11. Wing, 2|. Tail, 2. Culmen, |-. 



Female. — Upperside golden-green, remainder of plumage 

 like the male, but less brilliant, and pale golden on abdomen 

 and flanks. 



Total length, 3|^in. Wing, 2|. Tail, i^. Culmen, -|. 



This species is very abundant in Colombia. My other 

 specimens were collected in Venezuela, by Doctor Carlos 

 Rojas, and in Ecuador and Bolivia, by Buckley. 



434. Petasophora CABANISI, Lawr., Ann. Lye, Nat. Hist., 



N.Y., t. ix., p. 126. 



Petasophora cabanidis, Heine, Journ. fur Ornith., 1863, 

 p. 182. 



Cabanis little Violet-ear. 



le Pétasophore de Cabanis. 



Habitat. — Costa Rica, Veragua. 



Maie. — Exactly like the preceding species, but the feathers 

 of the chin and throat are much smaller, of a darker green, 

 and with scarcely any sign of the central dark green streak. 

 There is a bluish tinge on the breast, on the abdomen, and on 

 all the tail feathers, which do not exist in the specimens of 

 P. cyanotis. Undertail-coverts shining green, with a pale 

 buff margin on the lowest only. It forms the passage 

 between P. cyanotis and P. thalassina. 



Total length, 4Hn. Wing, 2|. Tail, 2. Culmen, \. 



Female. — Like the male, but less brilliant. 



I collected this species in May, 1877, on the \^olcano of 

 Irazu, Costa Rica, and I have also some specimens collected 

 by Arcé, in Veragua. 



435. Petasophora thalassina, Sw. Phil. Mag., 1827, p. 441. 



Ornismya anais, Less., Colib., 1831, p. 104. 



Raniphodon anais^ Less., Troch., 1831-32, p. 148. 



Polytmus thalassinus, Gray, Gen. Birds, vol. i., p. 108. 



Colibri thalassinus, Bon., Consp., Gen. Av., 1850, vol. i., 

 p. 69. 



Praxilla thalassina^ Reich., Aufz. der Colib., 1853, P- ^3* 



Mexican Violet-ear, Gould, Mon. Troch., vol. iv., p. 227, 



