Carriker : List of the Birds of Costa Rica. 463 



This beautiful hawk is fairly common throughout the Caribbean low- 

 lands, more so in the northern part, from which it spreads northwest- 

 ward to the northern part of Guanacaste in small numbers. It has also 

 been taken in the Candelaria Mountains (Frantzius), but I' think this 

 record doubtful, as it is quite out of the range of the bird. It is de- 

 cidedly an inhabitant of the more humid portion of the eastern low- 

 lands, although existing in smaller numbers elsewhere. It is not found 

 outside of the forests. Its favorite perch is on the top of some giant 

 of the forest, where it is very conspicuous by reason of its white color, 

 but quite safe from any weapon but a rifle. 



150. Leucopternis semiplumbea Lawrence. 



Leucoptemis semiplumbea Lawrence, Ann. Lye. N. Y., VII, 1861, 288 (Pan- 

 ama); IX, 1868, 133 (Valsa [J. Carmiol]). — Sclater and Salvin, Exotic 

 Orn., 1868, PI. 61. — Frantzius, Jour, fiir Orn., 1869, 368 (C. R. ).— 

 Ridgway, Bull. U. S. Geol. and Geogr. Surv. , 1876, 1, 1 78 ( Valsa [J. Carmiol] , 

 Talamanca and Old Harbor [Gabb]). — Zeeedon, An. Mus. Nac. de C. R., 

 I, 1887, 126 (Talamanca). — Salvin and Godman, Biol. Centr.-Am., Aves, 

 III, 1901, 84 (references cited). 



Urubitinga semiplumbea Sharpe, Cat. Birds Brit. Mus., I, 1874, 220 (Panama 

 and Costa Rica). 



C. H. Lankester Collection : Guacimo and Cariblanco de Sarapiqui. 

 Carnegie Museum: Rio Sicsola, Guacimo, El Hogar (Carriker). 



Four skins. 



This species ranges over the whole of the Caribbean lowlands from 

 Panama to Nicaragua, up to an elevation of probably not more than 

 1,200 feet. It is strictly an inhabitant of the forests, never going 

 beyond the margin of the dense jungle peculiar to its range, nor have 

 I ever seen it fly above the tree-tops. As a rule they are to be seen 

 perched on a limb at no great height from the ground, and, sitting 

 perfectly still, will permit themselves to be approached quite closely 

 before flying. 



151. Leucopternis princeps Sclater. 



Leucopternis princeps Sclater, P. Z. S. , 1865, 429 (Tucurriqui [Arce]). — 

 Lawrence, Ann. Lye. N. Y., IX, 1868, 133 (Tucurriqui [Arce]).— 

 Frantzius, Jour, fiir Orn., 1869, 368 (C. R. ). -- Ridgway, Proc. U. S. Nat. 

 Mus., VI, 1883, 415 (Van Patten Coll. — three specimens). — Salvin and 

 Godman, Biol. Centr.-Am., Aves, III, 1901, 83 (references). 



Urubitinga princeps Sharpe, Cat. Birds Brit. Mus., I, 1874, 220. 



C. H. Lankester Collection : Cariblanco de Sarapiqui. 

 Carnegie Museum : La Hondura (Carriker). One skin. 



