182 GENERA AND SPECIES. 



Canino, who takes the Trochilus Saucerottii of 

 Bourcier (Saucerottia typica), in Rev. Zool. 1846, 

 as his normal standard. 



To this form belong the Crimson-rumped 

 Humming-bird, Ornismya Erythronotos, Lesson, 

 described in the Nat. Lib. Ornith. vol. ii p. 89; 

 Neuwied's Humming-bird, Trochilus Cyanogenys, 

 idem, p. 89 ; and the Atala, Ornismya Atala, 

 idem, p. 90. Mr. Gould describes a species 

 under the title of Trochilus (Saucerottia) cali- 

 gatus, and which is closely allied to Tr. Sauce- 

 rottii. In this species the crown of the head 

 and the upper surface are green ; the throat and 

 all the under surface resplendent grass-green; 

 wings purplish black ; upper tail- coverts and 

 tail bright steel-blue ; under tail-coverts the 

 same, fringed with white; thighs and tarsi 

 clothed with snow-white feathers. 



Total length, 3| inches ; biU, f ; tail, f . 



Locality: New Granada. In Gould's collec- 

 tion. 



Genus AMAZILITJS (Polytmus, in part, Gray.) 

 Bonaparte. 



In this genus the bill is dilated at the base, 

 and nearly straight. The tail consists of equal 

 feathers, elongated, and pointed. The type is 

 represented by the Ornismya Amazilii of Lesson 

 (latirostris, Swainson). It is a native of Peru. 



"We shall here describe the Trochilus {Amazi- 

 lius) Norrisii, of Bourcier, in Proceed. Zool. Soc. 

 1847. 



