646 Annals of the Carnegie Museum. 



383. Sclerurus guatemalensis (Hartlaub). 



Tinactor guatemalensis Hartlaub, Rev. Zool., 1844, 370 (Guatemala). 



Sclerurus guatemalensis Sclater and Salvin, Ibis, 1859, 118. — Zeledon, An. 

 Mus. Nac. de C. R., I, 1887, 114 (Jimenez and Pozo Azul de Pirris). — 

 Ridgway, Proc. U. S. Nat. Mus., XII, 1889, 30 (Sibuhue de Talamanca, 1873 

 [Zeledon]; San Carlos and Jimenez [Alfaro]). — Sclater, Cat. Birds Brit. 

 Mus., XV, 1890, 117 (Guatemala to Ecuador; no Costa Rican specimens). 

 — Salvin and Godman, Biol. Centr.-Am., Aves, II, 1891, 168 (Costa Rican 

 references). — Underwood, Ibis, 1896, 440 (Miravalles). — Bangs, Auk, 

 XXIV, 1907, 299 (Boruca, Paso Real and El Pozo de Terraba [Underwood]). 



U. S. Nat. Museum: Bonilla (Ridgway), La Concepcion de Jimenez 



(Cherrie). 

 Bangs Collection : La Vijagua, Cerro de Santo Maria, El General de 



Terraba (Underwood). 

 Carnegie Museum : El Hogar, El Pozo, Boruca (Carriker). Four 



skins. 



Birds from northwestern Costa Rica are a little darker and more 

 richly colored than skins from Guatemala and British Honduras, while 

 Panama (Loma del Leon) skins are indistinguishable from the northern 

 specimens. This is probably only individual variation, and at all 

 events is not sufficient to warrant separating them as a local race. 

 This is the most abundant species of the genus in Costa Rica, being 

 found over the entire lowland region of both the Pacific and Carib- 

 bean, from near sea-level up to about 1,500 feet. It is found only in 

 the thick dark forest, and is invariably encountered near the ground, 

 oftentimes being flushed from the ground, where it had been scratch- 

 ing about among the leaves, in search of insects or larvae. The bird 

 in life has little resemblance to a true Dendrocolaptine bird. I have 

 never heard it give any call or alarm-note, and have always found it 

 alone and exceedingly shy. 



384. Margarornis rubiginosa Lawrence. 



Margarornis rubiginosa Lawrence, Ann. Lye. N. Y., VIII, 1865, 128 (" San 

 Jose " [Frantzius]; coll. U. S. Nat. Mus.); IX, 1868, 106 (San Jose [Frant- 

 zius], San Mateo [Cooper]). — Frantzius, Jour, fiir Orn., 1869, 304 (Quebrada 

 Honda). — Boucard, P. Z. S., 1878, 60 (Navarro). — Zeledon, An. Mus. 

 Nac. de C. R., I, 1887, 113 (San Mateo). — Sclater, Cat. Birds Brit. Mus., 

 XV, 1890, 122 (San Jose [Calleja], Irazu district [Rogers]). — Salvin and 

 Godman, Biol. Centr.-Am., Aves, II, 1891, 170 (Costa Rica to Panama; 

 C. R. references). 



U. S. Nat. Museum : Volcan de Turrialba and Coliblanco (Ridgway 



