INTRODUCTION. xcvii 



short and truncate; tarsi clothed ; /«?^^ rather small; hind toe shorter than the middle toe; nails short and 

 curved. 



Although I have placed this genus next to Cyanomyiay I consider that it has some relationship to the Amazilice. 



319. Hemistilbon Ocai, Gould. 



Amazilia Ocai, Gould -••••.-...... Vol. V. PI 289 



Pyrrhophaena Ocai, Cab. et Hein. Mus. Hein. Theil iii. p, 36, note. 



Habitat. Mexico. 



This beautiful species was discovered by M. Rafael Montes de Oca at Xalapa. 



In this genus I provisionally place the Trochilus Norrisi, of which a single specimen exists in the Loddio-esiaii 

 collection, but unfortunately is so situated that I could not subject it to so careful an examination as I could have 

 desired. 



320. Hemistilbon Norrisi. 



Trochilus Norrisii, Bourc. Proc. of Zool. Soc. part xv. p. 47. 



Polytmus Norrisi, Gray and Mitch. Gen. of Birds, vol. i. p. 108, Polytmtis, sp. 71. 



Amazilia Norrisii, Reichenb. Aufz. der Col. p. 10 ; Id. Troch. Enum. p. 8. 



Amazilia norrisi, Bonap. Rev. et Mag. de Zool. 1854, p. 254. 



Pyrrhophaena Norrisi, Cab. et Hein. Mus. Hein. Theil iii. p. 36, note. 



Habitat, Bolanos in Central Mexico. 



At present only one species is known of the 



Genus Leucippus, Bonap, ; 



but I am inclined to believe that other birds of this form exist ; indeed I have all but positive evidence that such is 

 the case, in a specimen killed by M. Warszewicz in Peru, which for the present I decline describing, as it may 

 possibly be only a female of some unknown species, the male of which will be differently coloured. 



321. Leucippus chionogaster Vol. V. PL 290. 



Leucippus chionogaster, Cab. et Hein. Mus. Hein. Theil iii. p. 31. 



Habitat. Peru and Bohvia. 



Genus Leucochloris, Reichenb, 

 This is another form of which a single species only has yet been discovered. 



322. Leucochloris albicollis . Vol. V. PL 291. 



Trochilus vulgaris, Wied, Beitr. iv. p. 72. 



Leucippus albicollis, Reichenb. Troch. Enum. p. 8, pi. 782. figs. 4818-19. 

 Agyrtria albicollis. Cab. et Hein. Mus. Hein. Theil iii. p. 32. 

 Thaumatias albicollis, Burm. Th. Bras. tom. ii. p. 342. 



Habitat, Brazil ; and Tucuman, according to Dr. Burmeister. 



This is a very pretty species, distinguished by its green and white plumage. The sexes are alike in external 

 appearance. 



The genus Thaumatias, as proposed by Bonaparte and adopted by me, comprises many species respectino- 

 which much confusion exists, especially with regard to the names appUed to them by the older authors ; some 

 confusion also occurs with respect to the species I have called Thaumatias Linnmi, which I fear cannot be satis- 

 factorily unravelled. If it should be decided that it is not the bird Bonaparte intended, I trust it will be allowed 

 to stand as the " Thaumatias Linncei, Gould, nee Bonap." The other synonyms may or may not be applicable to it, 

 but they are given on the authority of M. Bourcier of Paris. This is another of those instances which unfortunately 

 occur too frequently for the advantage of science ; I mean the impossibility of determining the species intended in 

 the curt descriptions left us by Gmelin and others of Tobaci or Tobagensis, Ourissia, cum multis ahis. 



Genus Thaumatias, Bonap, 



The species of this form are natives of Brazil, the banks of the Rivers Amazon and Napo, the Guianas, the 



2 c 



