\ 



1918.] NATURAL SCIENCES OF PHILADELPHIA. 255 



Stomach filled with very small insects of a greenish metallic lustre. 

 A bird of the jungle. 



150. Polyerata amabilis (Gould). Lovely Hummingbird 



Three males, Gatun, January 1, February 11, 1912, and April 9, 

 1911. Iris dark brown, bill black yellowish below with black tip, 

 feet black. 



Shot in the jungle. 



151. Lepidopyga caeruleogularis (Gould). Duchassain's Hummingbird. 



Three males and a female, Gatun, March 2, 1911, and May 30, 

 August 11, 1912; two other males, Mt. Hope, August 31, 1913, and 

 Ft. Lorenzo, Januarj' 7, 1912. Iris and feet black, maxilla black, 

 mandible pink with a black tip. 



152. Saucerottia edwardi (DeLattre and Bourcier). Wilson's Hummingbird. 



Three males, Gatun, April 14, 1911 (2), March, 1912. Iris, feet 

 and maxilla black, mandible pale tipped with black. 

 Obtained in the forest. 



[153.] Saucerottia niveoventer (Gould). Snowy-breasted Hummingbird. 

 154. Amazilia tzacatl tzacatl (De la Llave). Rieffer's Hummingbird. 



Two males and two females, Gatun, July 4, 1911, May 30, 1912, and 

 May 7, 1911, January 14, 1912. Iris and feet black, bill black pur- 

 plish about the nostrils and below. 



A nest found April 30 was on the horizontal limb of a shrub, five 

 feet from the ground, a dainty cup of light yellow silky vegetable 

 fiber, with a few gray lichens on the outside, all held together by a 

 network of spiders' webs. Contained two fresh eggs May 7. Another 

 nest about fifteen feet from the ground in similar situation found 

 May 7 contained one egg and one young bird. (Jewel.) 



It seems to the writer that it will be necessary to revert to the 

 generic name Amazilia Lesson for these birds. When Dr. Oberholser 

 proposed to adopt Amizilis Gray (Proc. Acad. Nat. Sci. Phila., 1899, 

 p. 206) he asked me to verify some references for him and through a 

 misunderstanding a quotation from Gray's large work, "Genera of 

 Birds," was quoted as from his "List of Genera of Birds, 1840." This, 

 however, does not affect the main question and is mentioned in order 

 to correct an obvious error for which I am mainly responsible. 



The generic name Amizilis does occur in Gray's 1840 "List" as 

 correctly quoted in the IgflO edition of the "A. O. U. Check-List," 

 i. e., p. 14, with the following as its basis: 



A. latirostris (Sw.) n. Ois. M., pi. 12. Or. amizili Less. 



The A. O. U. committee accepted Orthorhynchus amizili Less, as the 

 type on the basis of Gray's use of it alone in his 1855 edition of the 



