Carriker : List of the Birds of Costa Rica. 697 



586 (western Panama and highlands of Costa Rica: Birris, Achiote de Poas, 

 Volcan de Irazii, Volcan de Poas, Dota Mts., Rancho Redondo). 

 Mitre phanes atriceps Sclater, Cat. Birds Brit. Mus., XIV, 1889, 220 (Irazii 

 district [Rogers]). 



U. S. Nat. Museum: Volcan de Turrialba (Ridgway and Zeledon), Coli- 



blanco (Ridgway), Las Vueltas de Dota (Basulto). 

 Bangs Collection: Volcan de Irazu, Rancho Redondo, Dota Mountains 



(Underwood). 

 Carnegie Museum: Volcan de Irazu, Volcan de Turrialba (Carriker). 



Seven skins. 



This well marked species is restricted to the higher mountains of Costa 

 Rica, and is not usually seen below 7000 feet. It is most abundant between 

 8,000 and 10,000 feet on the volcanoes. It is primarily a bird of the forest 

 and many are still found there, but the majority of the birds on Irazu and 

 Turrialba have adapted themselves to the more open wooded pastures, 

 where they seem to be perfectly at home, perching on stumps and low 

 limbs of trees, whence they dart out at passing insects. In their habits 

 they more closely resemble Myiochanes virens than the other species of 

 Empidonax, in that they sit more quietly in one favorite spot and catch 

 passing insects. I took a nest of this species on the Volcan de Irazu, April 

 21, 1902, containing two fresh eggs. The nest was very similar to that of 

 Myiochanes virens, but smaller, and less smoothly made. It was saddled 

 in an upright fork of a small tree growing in the open pasture. The eggs 

 are creamy-white, without markings. Measurements: 17X13 and 17 

 X13 mm. 



4^3. Empidonax albigularis Sclater and Salvin. 



Empidonax albiguiu.is Sclater and Salvin, Ibis. 1859, 122 (Duenas, Guate- 

 mala). — Sclater, Cat. Birds Brit. Mus., XIV, 1888, 223 (no Costa Rican 

 specimens). — Salvin and Godman, Biol. Centr.-Am., Aves, II, 1889, 70 

 (Mexico, Guatemala, and Panama). — Cherrie, Proc. U. S. Nat. Mus., 

 XIV, 1891, 535 (Costa Rica; one specimen, compared with skins identified 

 by Salvin). — Ridgway, Birds N. and Mid. Amer., IV, 1907, 584 (southern 

 Mexico to Panama. — Costa Rica: Reventazon). 



U. S. Nat. Museum: Reventazon, d\ March 18, 1892 (Carranza); Faldas 



de Barba, May 12, 1889, c? juv. (Alfaro). 

 Bangs Collection: one skin without date or locality (Underwood). 



This Empidonax is very rare in Costa Rica, nor is it abundant anywhere 

 within its range. There are probably not more than two or three authentic 

 skins of the species which have been taken in Costa Rica, and which I 

 have listed above. I know nothing concerning its range or habits, but 



