396 Annals of the Carnegie Museum. 



In Costa Rican birds there is only a slight amount of bluish at the base 

 of the feathers, or none. The Costa Rican birds have the basal two- 

 thirds of the inner web of three outer rectrices bright russet-brown, 

 while in true nigrirostris there is only a trace of brown. The new 

 form has the upper parts paler and more olive-brown and the pileum 

 brighter with no trace of purplish. 



Measurements of C. nigrirostris nigrirostris : Male, wing, 161 ; 

 tail, 129. 



Measurements of C. nigrirostris brunneicauda : Male, wing 155; 

 tail, 123. 



Confined entirely to the lower portions of the country, on both 

 coasts, seldom going above 2,000 feet and more abundant at about 

 1,000 feet or lower. Like all members of the genus they keep pretty 

 well to the tree-tops, more open woodland, and fringes of trees along 

 streams. 



24. Columba subvinacea (Lawrence). 



Chlorcenas subvinacea Lawrence, Ann. Lye. N. Y., IX, 1868, 135 (Dota, Feb. 



26, 1867 [F, CarmiolJ). — Salvin, Ibis, 1869, 317 (crit. ). — Frantzius, 



Jour, fiir Orn., 1869, 317 (San Antonio). 

 Columba subvinacea BOUCARD, Proc. Zool. Soc, Lond., 1878, 43 (Candelaria). — 



Zeledon, An. Mus. Nac. de C. R., I, 1887, 127 (Las Trojas and Naranjo de 



Cartago). — Cherrie, Expl. Zool. en C. R., 1891-2, 1893, 53 (Lagarto); 



Expl. Zool. Rio Naranjo, 1893, 7 (Pozo del Pital). — Salvadori, Cat. Birds 



Brit. Mus., XXI, 1893, 326 (Barranca [J. Carmiol], San Jose [J. Carmiol]). 



— Salvin and Godman, Biol. Centr.-Arn., Aves, III, 1902, 239 (Azahar de 



Cartago and Sarchi de Grecia [Underwood]). 



U. S. National Museum : Guayabo (Ridgway & Zeledon), Coliblanco 



(Ridgway), Bonilla (Basulto), Las Trojas (Alfaro), Turrialba (J. 



Cooper). 

 Bangs Collection : Sarchi, La Estrella de Cartago, Azahar de Cartago 



(Underwood). 

 C. H. Lankester Collection : Guacimo. 

 Fleming Collection : Cachi (Underwood). 

 Carnegie Museum : Ujuras de Terraba (Carriker). One skin. 



Habits and range nearly the same as those of the preceding species, 

 although the present form is often taken at higher altitudes. 



25. Zenaidura carolinensis (Linnaeus). 



Zenaidura carolinensis Lawrence, Ann. Lye. N. Y., IX, 139 (Volcan Irazu 

 [Cooper], San Jose [J. Carmiol] ). — Frantzius, Jour, fur Orn., 1869, 372 

 (San Jose). — Boucard, Proc. Zool. Soc. Lond., 1878, 43 (San Jose, Jan. to 



