324 Annals of the Carnegie Museum. 



Erator albitorques Ridgway, Bull. U. S. Nat. Mus., No. 50, IV, 1907, 863 

 (Valencia, in range; references). 



Four specimens : Tucurinca and Fundacion. 



There are one adult and one immature male, and two females. The 

 adult male differs from Central American skins (Erator fraseri) in 

 being much paler gray above and especially below, where, indeed, it is 

 nearly white. The females are strikingly different from Central 

 American birds of the same sex, the back having scarcely any brown 

 wash, being mostly dull gray, while the rusty white frontlet is much 

 wider, the superciliary region more broadly chestnut, and the scapu- 

 lars, secondaries, and upper tail-coverts are paler, more whitish. Like 

 the male, the under parts in general are decidedly whiter, less grayish, 

 and the tail is sharply bicolor, being white at the base, with a definite 

 black area beyond, and the extreme tip white. These differences im- 

 press one as being of specific value. 



Mr. Hellmayr (Proceedings Zoological Society of London, 191 1, 

 1 142) finds that birds from western Colombia are identical with those 

 from northern Brazil and Peru, the latter being typical albitorquc*. 

 In addition to the above, we have one male from Gamarra, in the 

 Magdalena Valley, and there is a male from Daule, Guayas, Ecuador, 

 in the collection of the American Museum of Natural History, both 

 of which are precisely similar to the Santa Marta birds. 



The young male (No. 49,728, Fundacion, October 19) has a pale 

 under mandible, and is darker gray above than the adult, while the 

 head is marked like that of the female, with some gray feathers com- 

 ing in. 



This species is apparently confined to the Tropical Zone on the 

 southern and southwestern side of the Sierra Nevada. It was met 

 with (by the writer) only in the region about Tucurinca and Funda- 

 cion, where four specimens in all were secured. Simons secured a 

 pair at Valencia, as duly recorded by Salvin and Godman. 



274. Platypsaris homochrous canescens Chapman. 



Hadrostomus homochrous (not Pachyrhamphus homochrous Sclater, 1859) 



Sclater, Cat. Birds Brit. Mus., XIV, 188S, 334 ("Santa Marta"). — Allen, 



Bull. Am. Mus. Nat. Hist., XIII, 1900, 154 (Cacagualito and Bonda). 

 Platypsaris homochrous Ridgway, Bull. U. S. Nat. Mus., No. 50, IV, 1907, 859 



(Santa Marta localities and references). — Hellmayr, Proc. Zool. Soc. 



London, 1911, 1143 ("Santa Marta," in range). 



