Carriker : List of the Birds of Costa Rica. 721 



Ornilhion imberbe Sclater, Cat. Birds Brit. Mus., XIV, 1888, 126, part (Mexico 

 to Nicaragua). — Salvin and Godman, Biol. Centr.-Am., Aves, II, 1888, 

 29, part (no C. R. reference). 



C. H. Lankester Collection: Bebedero, May 4, 1906, cf. 

 Carnegie Museum Collection: Bebedero, May, 1906 (Carriker). 



The first specimen of the Beardless Flycatcher actually taken in Costa 

 Rica, of which I have any knowledge, was the one taken by Mr. Lankester 

 at Bebedero, May 4, 1906, although no record for it was ever published, 

 the second was the specimen in the Carnegie Museum, taken also at 

 Bebedero. In 1908, Underwood took five specimens at Bolson, Coralillo, 

 and Tenorio, as recorded by Mr. Bangs in a late paper. 



It would thus seem that it is a regular resident in the extreme north- 

 western portion of Costa Rica, from the Gulf of Nicoya northward, along 

 the Pacific watershed. It is a common bird farther north, extending up 

 to the southern border of the United States, so that its habits are well 

 known. 



489. Camptostoma pusillum flaviventre (Sclater and Salvin). 



Camptostoma flaviventre Sclater and Salvin, P. Z. S., 1864, 358 (Panama). 



Ornithion imberbe Cherrie, Proc. U. S. Nat. Mus., XIV, 1891, 535 (Costa Rica). 



Ornilhion pusillum (not Myiopatis pusilla, Cabanis and Heine) Sclater, Cat. 

 Birds Brit. Mus., XIV, 1888, 126, part (Panama). — Salvin and Godman, 

 Biol. Centr.-Am., Aves, II, 1888, 30, part (Panama, southward). 



Ornithion pusillum subflavum Cherrie, Proc. U. S. Nat. Mus., XV, 1892, 28 

 (Pozo Azul de Pirris, May, 1891 [Underwood]); Expl. Zool. en C. R., 1890-1, 

 1893, 32 (Palmar, Lagarto, and Buenos Aires de Terraba). 



Camptostoma pusillum flaviventre Ridgway, Birds N. and Mid. Amer., IV, 1907, 

 417 (Costa Rica and Panama; — Costa Rica: Pozo Azfil de Pirris, Pigres, 

 Bebedero). — Bangs, Auk, XXIV, 1907, 301 (El Pozo and Paso Real de 

 Terraba [Underwood]); Proc. Biol. Soc. Wash., XXII, 1909, 33 (Bolson, 

 one specimen [Underwood]). 



Bangs Collection: Pozo Azul de Pirris (Underwood). 



This southern species comes up the west coast of Costa Rica as far as 

 southern Guanacaste (Bolson), where it meets the northern form, C. 

 imberbe. It seems to be fairly common in the Terraba Valley, Cherrie 

 and Underwood both taking several specimens, although I did not get 

 it when there in 1907. The first authentic specimen known from Costa 

 Rica was that taken by Underwood at Pozo Azul de Pirris in May, 1891, 

 and described by Mr. Cherrie as Ornithion pusillum subflavum. 



490. Leptotriccus superciliaris Sclater and Salvin. 



Leptotriccus superciliaris Sclater and Salvin, P. Z. S., 1868, 389 (Chitra, 

 Panama). — Sclater, Cat. Birds Brit. Mus., XIV, 1888, 100 (Panama). — 



