266 Annals of the Carnegie Museum. 



The examination of the type-specimen, if extant, would readily settle 

 the matter. It is a curious fact that in the Tierreich and the Cata- 

 logue of the Birds in the British Museum the name Trochilus caligatus 

 appears in the synonymy of both "Amazilia" (Saiicerrottia) sophice 

 and " Spathura" (Ocrcatus) underwoodi. 



The most common species of the family in the lowlands and foot- 

 hills back of Santa Marta. Its local distribution is rather puzzling, 

 but probably its occurrence anywhere above 2,000 feet may be at- 

 tributed to an altitudinal migration in search of food, as it appears 

 there only during the season when the guama is in flower. It is resi- 

 dent all the year round in the lowlands and foothills of the San Lor- 

 enzo and Horqueta, but it has not been recorded from any point on the 

 north slope of the Sierra Nevada proper, although there are several 

 records from the south slope. It was not very abundant at Don Diego 

 or Dibulla, and was not seen at all after the coast was left behind. 

 Simons took it at Valencia, and the writer has lately met with it at the 

 same place, as well as at Fonseca and Loma Larga. 



213. Amazilia tzacatl tzacatl (De la Llave). 



Amazilia fuscicaudata Bangs, Proc. Biol. Soc. Washington, XII, 1898, 135 



(" Santa Marta *')• — Hartert, Tierreich, Lief. 9, 1900, 58 (" Andes of 



Santa Marta," in range). 

 Amizillis fuscicaudata Allen, Bull. Am. Mus. Nat. Hist., XIII, 1900, 139 



(Bonda and Cacagualito). 

 Amizillis sp. Allen, Bull. Am. Mus. Nat. Hist., XIII, 1900, 139' (Bonda). 

 Amizilis tzacatl tzacatl RincwAY, Bull. U. S. Nat. Mus., No. 50, V, 1911, 



408 (Santa Marta references and localities). 

 Amazilis tzacatl Simon, Cat. Fam. Trochilidse, 1921, 323 (" Santa Marta," 



in range). 



Nineteen specimens: Bonda, Buritaca, Don Amo, Don Diego, Fun- 

 dacion, Mamatoco, Dibulla, and Fonseca. 



Santa Marta specimens of this well-known hummingbird are pre- 

 cisely like others from Central America. There is much variation, 

 apparently merely individual, in the amount of bronzy tinge on the 

 upper parts. Females average duller than males, but the dark-colored 

 maxilla is not characteristic of the female sex, as stated by some au- 

 thors. 



A species which in this region is strictly confined to the lowlands of 

 the Tropical Zone on both sides of the Sierra Nevada, being most 



