Carrtker : List of the Birds of Costa Rica. 607 



Carnegie Museum : Guiipiles and Guacimo (Carriker & Crawford), 

 Rio Sicsola, Carrillo, El Hogar (Carriker). Thirteen skins. 

 This Dysithamnus is confined entirely to the Caribbean foothills, is 

 rarely seen below 800 feet and is most abundant at about 1,000 to 

 1,500 feet, especially in northeastern Costa Rica, where (at La 

 Vijagua) Underwood took a series of fifty-one specimens. I found it 

 common in the foot-hills south of the railroad from Guacimo to Car- 

 rillo. It is found in the heavy forest, low down among the dense 

 undergrowth and low trees, although it is not infrequently seen in 

 more open spots. The birds usually go about in small bands of from 

 five to ten and are very tame and unsuspecting. 



I took the nest of this species near Jimenez, May 12, 1905, con- 

 taining two badly incubated eggs. The nest is of the vireo type, con- 

 structed almost wholly of the black fibers from the stem of a woodland 

 fern, much resembling black horse-hair, and covered over on the outside 

 with green moss, which trailed down from the bottom for several inches. 

 It was suspended from a horizontal fork of a small tree near the edge 

 of the forest, about five feet from the ground. The female was incu- 

 bating, and did not leave the nest until nearly touched. The eggs 

 are creamy-white, with a few large lilac shell-markings and speckled, 

 dotted, and blotched more or less over the whole surface with purplish- 

 chestnut, heavier about the larger end. Measurements : 21 x 15 and 

 20.5 x 15.5 mm. 



342. Myrmotherula fulviventris Lawrence. 



Myrmotherula fulviventris Lawrence, Ann. Lye. N. Y., VII, 1862, 468 (Panama); 

 IX, 1868, 108 (Angostura [J. Carmiol]). — Zeledon, An. Mus. Nac. de 

 C. R., I, 1887, 115 (Pacuare and Jimenez). — Sclater, Cat. Birds Brit. 

 Mus., XV, 1890, 234 (Angostura [Carmiol]). — Salvin and Godman, Biol. 

 Centr.-Am., Aves, II, 1892, 210 (Costa Rican references; Honduras to 

 Ecuador). 



U. S. Nat. Museum: Jimenez (Alfaro), Rio Matina (Cherrie), 



Reventazon (Carranza). 

 Bangs Collection : La Vijagua and Carrillo (Underwood). 

 Carnegie Museum : Guapiles and Guacimo (Carriker & Crawford); 



Cuabre, Carrillo, El Hogar (Carriker). Fourteen skins. 



Very little has been recorded concerning this little ant-thrush, and 

 not many specimens of it are in collections from Costa Rica. It is 

 confined to the Caribbean lowlands, from sea-level up to not more 

 than 1,500 feet. It is most abundant at about 600 to 800 feet, that is 



