Carriker : List of the Birds of Costa Rica. 377 



This is a very distinct speeies and need not be confused with 

 T. robustus, being easily distinguished by the purplish-chestnut color 

 of the crown and hind neck. Neither do they seem to differ so much 

 among themselves as does robustus. A very young bird (Pozo Azul, 

 May 16) much resembles the adult, being more olive below and 

 slightly vermiculated with buff, while above there are very few black 

 bars, buffy spots being numerous on the back and wing-coverts, while 

 the secondaries and tertials are distinctly barred with dusky and rufous. 



The Costa Rican range of this bird seems to be the lowlands of the 

 southwest, coming up from Chiriqui and penetrating as far north as 

 Pozo Azul de Pirris, possibly farther, although there are no records for 

 its occurrence beyond that point. In this area it has entirely replaced 

 J. robustus and the latter is not met with until the more northern 

 portion is reached. Habits similar to T. robustus. 



4. Nothocercus frantzii (Lawrence). 



Tinamus frantzii Lawrence, Ann. Lye. N. Y., IX, 1868, 140 (Cervantes 

 [Zeledon]). — Frantzius, Jour, fiir Orn., [869, 374 (Cervantes [Zeledon]). — 

 Salvin, Ibis, 1874, 312 (Costa Rica). 



Xothocercus bonaparti BOUCARD, Proc. Zool. Soc. Lond., 1878, 41 (Rio 

 Navarro). — Zeledon, An. Mus. Nac. de C. R., I, 1887, 128 (Faldas de 

 Irazu). 



Nothocercus frantzii Salvadori, Cat. Birds Brit. Mus., XXVII, 1895, 512 

 (Irazu [Rogers]). — Salvin and Godman, Biol. Centr.-Am., Aves, III, 1904, 

 452 (Asseri, Achiote de Poas, Estrella de Cartago [Underwood]). 



U. S. Nat. Museum: Asseri de Irazu, El Achiote de Poas (Alfaro); 



La Estrella de Cartago, La Palma de San Jose (Zeledon). 

 Bangs Collection: Irazu (Underwood). 

 Carnegie Museum : Volcan Turrialba (4,000 ft.), Ujurras de Terraba 



(Carriker). Two skins. 



The characters separating this form from N. bonaparti seem to be 

 constant and well defined in all the skins examined (seven). It is 

 easily distinguished from all the other Costa Rican Crypturi -by its 

 black pileum and ruddy underparts. 



It is confined exclusively to the highlands and high mountains, 

 seldom ever being seen below an altitude of 5,000 feet. They keep 

 to the heavy forests, while their habits are essentially the same as those 

 of Tinamus. At Ujurras, September 12, a bird was seen with four or 

 five very small chicks, which it would not desert, but kept running 

 and fluttering about in a circle in its endeavors to lure me away from 



