Carriker : List of the Birds of Costa Rica. 765 



dant, right up to timber-line, so thick in many places as to be almost im- 

 penetrable. 



Upon a careful comparison of a series of birds from Irazu with a series 

 of T. browni from the Volcan de Chiriqui, I am forced to the conclusion 

 that the two birds are not specifically distinct, the differences between 

 them being entirely too small to be of specific value. 



546. Thryorchilus basultoi Ridgway. 



Thryorchilus basultoi Ridgway, Proc. Biol. Soc. Wash., XXI, 1908, 191 (Las 

 Vueltas, Cordillera de Dota, Costa Rica; adult female; May 21, 1908; Fran- 

 cisco Basulto; coll. U. S. Nat. Mus.). 



"Differing from T. browni and T. browni ridgwayi in having the pileum 

 and hindneck and auricular area dark sepia or nearly clove-brown, strongly 

 contrasted with the mummy-brown of back, instead of concolor with 

 the back; superciliary stripe much broader, pure white, white under parts 

 much purer, and white markings much more conspicuous; wing and tail 

 decidedly stronger, but bill much shorter and relatively stouter. Length 

 (skin), 95 mm.; wing, 52; tail, 32.5; exposed culmen, 1 1.5; tarsus, 22.5; 

 middle toe, 15." 



This bird was taken near the summit of the highest portion of the Dota 

 Mountains, evidently having the same habits as the preceding species. 

 It is known only from the single type specimen. 



547. Troglodytes ochraceus Ridgway. 



Troglodytes solstitialis Salvin and Godman, Biol. Centr.-Am., Aves, I, 1880, 

 102, part (Costa Rica). — Sharpe, Cat. Birds Brit. Mus., VI, 1881, 260, part 

 (Costa Rica). 



Troglodytes ochraceus Ridgway, Proc. U. S. Nat. Mus., IV, 1882, 334 (Vol. de 

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

 Nac. de C. R., I, 1887, 106 (Costa Rica). — Oberholser, Proc. U. S. Nat. 

 Mus., XXVII, 1904, 200 (Vol. de Irazu; crit.). — Ridgway, Birds N. and 

 Mid. Amer., Ill, 1904, 590 (high mountains of Chiriqui and Costa Rica: 

 Volcan de Irazu). — Bangs, Proc. N. Eng. Zool. Club, IV, 1908, 28 (Volcan 

 de Irazu [Underwood]). 



U. S. Nat. Museum: Coliblanco (Ridgway), Volcan de Irazu (Cherrie). 

 Bangs Collection: Azahar de Cartago, Volcan de Irazu, and Cariblanco 



de Sarapiqui (Underwood). 

 C. H. Lankester Collection: Volcan de Irazu. 

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



This seems to be a very rare species over its whole range, and but few 

 specimens have been taken, Mr. Bangs probably having more than are 



