414 Annals of the Carnegie Museum. 



dant on both Lagima Chiquita and Laguna Grande above Bonilla and 

 were very tame, seeming to have no fear of a human being. I have 

 never seen them in any of the lagoons near the coast, nor in any 

 running water, but always in ponds and lakes. 



53. Podilymbus podicips (Linnaeus). 



Colymbus podiceps Linnaeus, Syst. Nat., 1766, I, 223. 

 Podilymbus podiceps Sclater and Salvin, Ibis, 1859, 234. 



Carnegie Museum : Bonilla (Carriker). One skin. 



On November 11, 1907, I secured an immature male of this species 

 on Laguna Chiquita, near Bonilla. No others were on the lake, nor 

 did I see any on the large lake near by. I believe this to be the first 

 record for the taking of the Pied-billed Grebe in Costa Rica. 



Family LARID^. 

 54. Hydrochelidon surinamensis (Gmelin). 



Sterna surinamensis Gmelin, Syst. Nat., I, 1788, 604. 



Hydrochelidon nigra surinamensis Zeledon, An. Mus. Nac. de C. R., I, 1887, 



133 ( Puntarenas, one specimen). 

 Hydrochelidon surinamensis Saunders, Cat. Birds Brit. Mus., XXV, 1896, 20. 



— Salvin and Godman, Biol. Centr.-Am., Aves, III, 1903, 398 (Costa 



Rica — Zeledon' s record ) . 



I know of no other record of the taking of this bird on the coasts 

 of Costa Rica. Doubtless, like many other sea-birds, they range up 

 and down the coasts, but are rarely seen by persons who would recog- 

 nize them. 



55. Sterna maxima Boddaert. 



Sterna maxima Boddaert, Tabl. PI. Enl., 1783, 58. — Zeledon, An. Mus. Nac. 

 deC. R.,I, 1887, 133. 



I found this tern quite abundant on the Caribbean coast about 

 twelve miles below Port Limon in February, 1904. Several specimens 

 were secured, which together with other skins were afterward acciden- 

 tally lost. I did not notice it, or any other tern on the Pacific coast 

 in June or October, while going and coming from Puntarenas to the 

 mouth of the Rio Grande de Terraba. 



In Zeledon's List (An. Mus. Nac. de Costa Rica, 1887) he gives 

 four species of terns for Costa Rica, namely, Sterna maxima, S. nilotica, 

 S. fuliginosa, and S. anosihcetus, but gives no locality or indication 

 that specimens of them had been secured. I am inclined to infer from 



