igi8. CATALOGUE OF BIRDS OF THE AMERICAS CORY. 189 



Genus AMAZILIS Gray. 



Amazilis Gray, List. Gen. Bds., 1840, p. 14 (Type A. latirostris Swainson). 



*Amazilis tzacatl tzacatl (De la Llave). RIEFFER'S HUMMING BIRD. 



Trochilus tzacatl DE LA LLAVE, Registro Trimestre, II, No. 5, 1833, p. 48 (Mexico). 



Amazilia or Amazilis tzacatl RICHMOND, Auk, 1899, p. 324, in text. 



Amazilia riefferi GOULD, Mon. Trochil., V, 1861, pi. 311; SALVIN, Cat. Bds. Brit. 

 Mus., XVI, 1892, p. 216, part (Mexican and Central American references). 



Amazilia dubusi SHARPS, Hand List, II, 1900, p. 108. 



Amazilia fuscicauda (nee. FRASER) of authors (Mexican and Central American 

 references from Panama, northward). 



Amazilis tzacatl tzacatl RIDGWAY, Bull. U. S. Nat Mus., No. 50, V, 1911, p. 408, 

 part; (Lower Rio Grande, Texas, Mexico, Central America and Colombia); 

 CHAPMAN, BulL Am. Mus. N. H., XXXVI, 1917, p. 288, crit. (various lo- 

 calities in Colombia). 



Range: Southeastern Mexico south to Panama. 

 22 : Costa Rica (Limon 4, Guayabo 1 1) ; Nicaragua (San Emilis) ; i 

 Guatemala (Los Animas) 3; Panama (Colon, 2, Chiriqui i). 



* Amazilis tzacatl jucunda a (Heine). HEINE'S HUMMING BIRD. 



Eranna jacunda HEINE, Journ. fur Ornith., XI, 1863, p. 188 (Babahoyo, west 

 Ecuador). 



Amazilia tzacatl jucvnda HELLMAYR, Proc. Zool. Soc. Lond., 1911, p. 1182; CHAP- 

 MAN, Bull. Am. Mus. N. H., XXXVI, 1917, p. 289 (crit.). 



A. riefferi SCLATER, Proc. Zool. Soc. Lond., 1879, p. 530 (Antioquia). 



Range: Low Countries of western Ecuador, and southwestern 

 Colombia. 



7: "Colombia" 5; and Ecuador (Peramba) 2. 



*Amazilis tzacatl fuscicaudata b (Fraser). DUSKY-TAILED HUMMING 

 BIRD. 



Amazilia fuscicaudata FRASER, Proc. Zool. Soc. Lond., 1840, p. 17 ("Chacha- 



poyas, Peru " = Bogota, Colombia). 

 A. t. fuscicaudata HELLMAYR, Proc. Zool. Soc. Lond., 1911, p. 183, in text. 



Range: Andes of eastern Colombia (Bogota, etc.) and Venezuela 

 (Merida). 



14: Western Venezuela (Colon, Tachira, near the Colombian line). 



a Amazilis tzacatl jucunda HEINE: Similar to A. t. tzacatl (E>E LA LLAVE) from 

 Central America in general plumage and length of bill, but differs in having the upper 

 mandible fleshy brown (instead of blackish) and the abdomen decidedly darker 

 smoke-gray. 



b Amazilis tzacatl fuscicaudata (FRASER): Claimed to differ in smaller size and 

 bill shorter and stouter. A somewhat questionable race, but averages shorter 

 especially in specimens from western Venezuela (Colon, Tachira). In this connec- 

 tion cf. Chapman, Bull. Am. Mus. N. H., XXXVI, 1917, p. 288 in text. 



Cf. Salvin, Cat. Bds. Brit. Mus., XVI, 1892, p. 217, in text. 



