672 Annals of the Carnegie Museum. 



der Attila citreopygus citreopygus, and give for the range of that bird 

 the whole of Nicaragua, COsta Rica, and at least the northern half of 

 Panama. 



A series of eight specimens from Loma del Leon, Panama, are so 

 constant, and differ to such a great extent from Costa Rican specimens 

 that they may have to be separated and given a name, but I have hesi- 

 tated to do so. They differ in being much smaller, especially the bill ; 

 in being very white below, except on the chest ; in having the pileum 

 and nape yellowish olive-green, scarcely streaked, except on the fore- 

 head, and in having the yellow of the rump more extended upon the 

 back and very pale yellow, almost canary-yellow. 



416. Attila tephrocephalus Ridgway. 



Attila tephrocephalus Ridgway, Proc. Biol. Soc. Wash., XIX, 1906, 118 (Tala- 

 manca, Costa Rica; coll. U. S. Nat. Mus.); Biids N. and Mid. Amer., IV, 

 1907, 804 (southeastern Costa Rica: Talamanca). 



This species was described by Mr. Ridgway from a single specimen, 

 and as yet no others have been taken like it. Mr. Bangs and I have 

 both examined the type and are of the opinion that the specimen in 

 question is only an extreme variation of A. citreopygus citreopygus, 

 which is an exceedingly variable species. It seems to be the extreme 

 gray ph-»se, approaching which there are other specimens in the Car- 

 negie Museum and Bangs collection. 



417. Idiotriccus zeledoni (Lawrence). 



Pogonotriccus ? zeledoni Lawrence, Ann. Lye. N. Y., IX, 1868, 144 (Dota and 



Barranca [F. Carmiol]). 

 Pogonotriccus zeledoni Zeledon, Proc. U. S. Nat. Mus., VIII, 1885, 108. — 



Salvin and Godman, Biol. Centr.-Am., Aves, II, 1888, 19 (Costa Rican 



references). 

 Idiotriccus zeledoni Ridgway, Proc. Biol. Soc. Wash., XVIII, 1905, 210 (crit.); 



Birds N. and Mid. Amer., IV, 1907, 797 (northwestern Panama and Costa 



Rica: Barranca and Dota). 



Carnegie Museum: Carrillo, August 27, 1905, d 1 ; Las Mesas, Nov. 



7, 1907, c? (Carriker). 



This is another of the exceedingly rare birds of Central America, 

 being confined to Costa Rica and northern Panama (so far as now 

 known), unless the South American Pogouotriccus opthalmicus Tacza- 

 nowski is the same thing, as suggested by some authors. Mr. Bangs 

 has three specimens from Chinqui, but none from Costa Rica, and 



