742 Annals of the Carnegie Museum. 



interbred there. At all events more material is necessary to satisfactorily 

 settle the exact status of these two birds in Costa Rica. 



Both races of P. tristis have about the same habits, inhabiting the heavy 

 forest, much like P. obsoletus and plebejus, and seem to be rare, except in 

 a few localities. 



517. Planesticus tristis cnephosa (Bangs). 



Turdus leucauchen Baird, Review of Am. Birds, 1864, 24, part (Dota Mts., 

 Costa Rica). — Lawrence, Ann. Lye. N. Y., IX, 1868, 91, part (Navarro 1 

 [Cooper], Dota Mts. [F. Carmiol]). 



Turdus tristis Underwood, Ibis, 1896, 432 (Volcan de Miravalles). 



Turdus tristis Salvin and Godman, Biol. Centr.-Am., Aves, I, 1879, 15, part 

 (Dota Mts. and Navarro, Costa Rica). — Seebohm, Cat. Birds Brit. Mus., 

 V, 1 88 1, 2ii, part (Costa Rica). 



Merula tristis Zeledon, An. Mus. Nac. de C. R., I, 1887, 104 (Santa Maria de 

 Dota and Pozo Azul de Pirris). — Cherrie, Expl. Zool. en C. R., 1891-2, 

 1893, 2 (Boruca). 



Merula leucauchen cnephosa Bangs, Proc. N. Eng. Zool. Club, III, 1902, 92 

 (Chiriqui). 



Planesticus tristis cnephosa Ridgway, Birds N. and Mid. Amer., IV, 1907, no 

 (Pacific slope of Central America; Costa Rica: Barranca, Dota, Santa Maria, 

 Navarro 1 ). — Bangs, Auk, XXIV, 1907, 330 (Boruca, large series [Under- 

 wood]). 



U. S. Nat. Museum: El Copey and Santa Maria de Dota (Basulto). 

 Bangs Collection: El General de Terraba and Alajuela (Underwood). 

 C. H. Lankester Collection: Miravalles. 

 Carnegie Museum: Boruca (Carriker). Two skins. 



According to Mr. Ridgway, this race of P. tristis is confined to the 

 Pacific slope, and all the specimens which I have seen confirm that state- 

 ment. Underwood took a series of forty-four skins in the Boruca region 

 in 1906, but I found it very scarce there the following year, evidently with 

 good reason. It is very probable that in the extreme northwestern part 

 of the country, the eastern race is found in company with the western, 

 the divide there being so low that the birds pass back and forth. 



518. Zeledonia coronata Ridgway. 



Zeledonia coronata Ridgway, Proc. U. S. Nat. Mus., XI, 1889, 538 (Volcan de 

 Poas, Costa Rica, Nov. 23, 1888 [Alfaro]; coll. U. S. Nat. Mus.). — Pycraft, 



1 In " Birds of N. and Middle America," Mr. Ridgway places the locality, Na- 

 varro, under this subspecies, which was probably done in ignorance of the true 

 location of that place. It is near the Reventazon River below Cartago, and de- 

 cidedly on the Caribbean slope, so that specimens of P. tristis taken there would 

 undoubtedly be the eastern form, P. t. leucauchen. 



