Carriker : List of the Birds of Costa Rica. 603 



U. S. Nat. Museum : Reventazon (Carranza), Talamanca (Cherrie), 



Jimenez (Verrill). 

 C. H. Lankester Collection : Guacimo. 

 Carnegie Museum : Guacimo (Carriker & Crawford) ; Guacimo, 



Cuabre, Rio Sicsola, El Hogar (Carriker). Fourteen skins. 



Upon comparing T. atrinucha with T. ncevius of South America, 

 I find the differences between the two birds too small to admit of 

 specific distinction, and have therefore placed it as a subspecies of 

 T. ncevius, the form first described. 



The range of T. ncevius atrinucha in Costa Rica is confined to the 

 Caribbean lowlands and lower foot-hills, the bird scarcely ever being 

 found higher than 1,500 feet and then only up the large river-valleys. 

 It is much more abundant in the low flat land lying along the coast, 

 especially along the lower portion of the Sicsola River. It, too, prefers 

 the thick, matted jungle to the heavier forest-growth, and like all the 

 members of the genus is very tame and rather stupid. 



I took a single nest of this species on the Sicsola River, August 6, 

 1904, containing two badly incubated eggs. The nest is of the 

 vireo type, made of rootlets, moss, and weed-fibers, lined with fine, 

 reddish weed-fiber and decorated on the outside with moss. It was 

 hung in a horizontal fork of a small shrub, four feet from the ground, 

 and near a small creek in the deep forest. The outside diameter of 

 the nest is about four and one-half inches \ inside three and one-half 

 inches. The eggs are creamy-white, thickly and heavily blotched and 

 speckled with reddish-brown and lilac. Measurements: 24 X 16.5 

 and 24.5 x 17 mm, 



337. Thamnophilus doliatus mexicanus Allen. 



Laniiis doliatus Linnaeus, Syst. Nat., ed. 12, I, 1766, 136 (South America). 



Thamnophilus doliatus Zeledon, An. Mus. Nac. de C. R., I, 1887, 114, part 

 (Jimenez, Cartago, Naranjo de Cartago). — Sclater, Cat. Birds Brit. Mus., 

 XV, 1890, 207, part (no Costa Rican specimens). — Salvin and Godman, 

 Biol. Centr.-Am., Aves, II, 1892, 202, part (Costa Rican references). 



Thamnophilus nigricristatus Boucard, P. Z. S., 1878, 60, part (San Carlos). 



Thamnophilus doliatus mexicanus Allen, Bull. Am. Mus. Nat. Hist., II, 1889, 

 151 (Mexico; crit.). — Ridgway, Proc. Biol. Soc. Wash., XXI, 1908, 192 

 (Atlantic slope from southern Tamaulipas, Mexico, to Costa Rica). 



Carnegie Museum : Juan Vinas (Carriker). Three males. 



The eastern or rather northern race of T. doliatus is confined to the 



northeastern portion of Costa Rica (thence northward) in the Carib- 



