Carriker : List of the Birds of Costa Rica. 753 



from sea-level up to about 1,500 feet, over the whole length of the country. 

 It is exclusively an inhabitant of the dense, dark forest, where it keeps 

 close to the ground. The birds are almost always seen in small flocks in 

 company with one or more species of small ant-thrushes (Ramphoccenus 

 semitorquatus, Myrmeciza exsul, etc.), and when disturbed set up a con- 

 tinuous chattering of a low guttural nature, all the while hopping about 

 excitedly among the low bushes and the roots of the trees. It has a song 

 which is very fine, almost rivalling that of Henicorhina prostheleuca in its 

 clearness and sweetness. It is not an abundant bird, and may not be met 

 with more than once in a week's collecting, seeming to travel about in 

 flocks (when not breeding) from one place to another. 



533. Microcerculus luscinia Salvin. 



Microcerculus luscinia Salvin, P. Z. S., 1866, 69, 71; 1867, 134 (Santa Fe and 

 Santiago de Veragua [Arcej). — Salvin and Godman, Biol. Centr.-Am., 

 Aves, I, 1880, 77, pi. 5, fig. 4. — Sharpe, Cat. Birds Brit. Mus., VI, 1881, 

 298 (Veragua and Panama). — Ridgway, Proc. U. S. Nat. Mus., XVI, 1893, 

 609 (Boruca, Costa Rica; desc. female; crit.). — Cherrie, Expl. Zool. en 

 C. R., 1891-2, 1893, 6 (Boruca, one specimen). — Zeledon, An. Mus. Nac. 

 de C. R., I, 1887, 105 (Pacuare). — Ridgway, Birds N. and Mid. Amer., 

 Ill, 1904, 669 (Isthmus of Panama from Panama Railroad to southwestern 

 Costa Rica: Boruca). — Bangs, Proc. Biol. Soc. Wash., XXII, 1909, 34, 

 in text (crit.). 



Microcerculus acentetus Bangs, Proc. N. Eng. Zool. Club, III, 1902, 56 (Boquete, 

 Chiriqui [Brown]). 



Microcerculus daulias Ridgway, Proc. U. S. Nat. Mus., X, 1888, 508 (Talamanca, 

 Costa Rica [Cooper]; coll. U. S. Nat. Mus.). — Zeledon, An. Mus. Nac. de 

 C. R., I, 1887, 105 (Costa Rica). — Ridgway, Birds N. and Mid. Amer., 

 Ill, 1904, 668 (eastern Costa Rica: Pacuare and Talamanca). — Bangs, 

 Proc. Biol. Soc. Wash., XXII, 1909, 34, in text (critical). 



Microcerculus orpheus Ridgway, Proc. U. S. Nat. Mus., XI, 1889, 539 (Pacuare, 

 Costa Rica [Cooper]; coll. U. S. Nat. Mus.). — Zeledon, An. Mus. Nac. 

 de C. R., I, 1887, 105 (Costa Rica). 



Bangs Collection: El General deTerraba, four cf's; La Vijagua, cf and 9; 



Cerro de Santa Maria, two cf's and 9 ; Tenorio, two 9 's (Underwood). 

 Carnegie Museum: Ujurras de Terraba, cf and 9 (Carriker). 



Mr. Bangs has given a very careful and intelligent discussion of the Cen- 

 tral American species of this genus (Proc. Biol. Soc. Wash., XXII, 1909, 

 34), and after going over his material with him I can arrive at no other 

 conclusion than his, namely, that there is but one form of Microcerculus 

 inhabiting Costa Rica and Panama. As to M. philomela of Guatemala, I 

 am not prepared to give an opinion, not having had the opportunity of 



