^°i89l''] proceedings of the national museum. . 343 



GraUaria lizanoi is au iiibabitaut of the Pacific coast side of the Cor- 

 dillera, while dives and intermedia seem confined to the Atlantic side, 

 the former ranging north into Nicaragua, while the latter is, I believe, 

 a bird confined more to the southeastern '•'■ tierra caliente^^ of Costa 

 Eica, jwssibly extending to Panama. 



I take pleasure in naming this beautiful species of ant thrush after 

 the Hon. Don Joaquin Lizano, minister of state of the Republic of Costa 

 Eica, to whom so much is due for the material advancement and intel- 

 ligent progress of various institutions of the country, including espe- 

 cially the Museo Nacional. 



Pachyrhamphus cinereiventris and allied forms. 



Young males are similar to the females ; in some specimens, just assum- 

 ing the adult phase, a part of the rectrices have white tips and part 

 have cinnamomeous tips; the same peculiarity is seen in the primaries 

 and secondaries. 



Adult male birds from Costa Eica differ from " Bahia" birds, labeled 

 2)oh/ehropteraj not only in the smaller size, but in having the under wing- 

 coverts and axillaries plain slate-gray, like the breast. The " Bahia " 

 birds have the axillaries and under wing coverts more or less mottled 

 with white, and the bend of the wing whiter. 



There are two other birds, male and female, in the U. S. National 

 Museum collection, from Greytown, Nicaragua, that while closely allied 

 to both cinereiventris and j^oJijchroptera, have peculiarities sufficient, in 

 my judgment, to separate them from either, as well as they (the two 

 latter) are sei)arated one from another. In fact, I believe sufficient ma- 

 terial would show the three to be races of but a single species. 



The male, like that of cinereiventris and polychroptera has the back 

 black; head shining steel-bluish black; rump grayish; under parts 

 slate-gray. But the bill is decidedly larger * than either of its allies, the 

 wing and tail are equal to those of cinereiventris and smaller than in 

 polychrojytera. The female has the back and head more olive-greenish 

 and the lower parts paler than females of cinereiventris, which latter 

 species has also the back more or less tinged with brownish. 



For this Nicaragua bird, in case future material may prove more con- 

 clusively its distinctness, I would propose the name Pachyrhamphus 

 similis. 



Arremou aurantiirostris. 



Examining a series of these birds from the Atlantic and Pacific sides 

 of the Cordillera, the birds from the Pacific side represented by speci- 

 mens from Panama north through Veragua into Costa Rica, those from 



