Carriker : List of the Birds of Costa Rica. 657 



El Hogar, Juan Vifias, Buenos Aires, Boruca (Carriker). Eighteen 



skins. 



The range of this common tree-creeper extends over the whole 

 of the Caribbean lowlands and up the mountain slopes to about 3,000 

 feet, slightly overlapping the range of the mountain species, P. affinis 

 neglectus ; on the Pacific side it is found over the whole of the low- 

 land country and into the foothills to an altitude of scarcely more than 

 1,500 feet. It is, comparatively speaking, an abundant bird wherever 

 found. There are no species of Dendrocolaptidoe very abundant in 

 individuals, at least not in Costa Rica, their increase beyond a certain 

 point being prevented by some natural cause, probably lack of proper 

 food. This species is found in open woodland and scattered clumps 

 of trees to a considerable extent, being about the only Costa Rican 

 species which leaves the heavy forest at all. 



There can be no doubt that the type of Picolaptes gracilis Ridgway 

 is an immature or abnormally colored individual of this species. Mr. 

 Ridgway himself says that he has little doubt that this is the case 

 (Proc. U. S. Nat. Mus., XIV, 1891, 475), and after examining the 

 type I quite agree with his decision. 



398. Campy lorhamphus pusillus borealis subsp. nov. 



Xiphorhynchus pusillus Sclater, P. Z. S., i860, 278 (Colombia, " Bogota "); 

 Cat. Birds Brit. Mus., XV. 1890, 160 (Costa Rica [Endres]). — Boucard, 

 P. Z. S., 1878, 60 (Juan Vifias, one specimen). — Zeledon, An. Mus. Nac. de 

 C. R., I. 1887, 114 (Birris). — Chapman, Bull. Am. Mus. Nat. Hist., II, 1889, 

 157 (Costa Rica [Zeledon]; monogr. of genus). — Cherrie, Auk, IX, 1892, 

 250 (San Jose, accidental visitor; one taken August 26, 1891). — Salvin and 

 Godman, Biol. Centr.-Am., Aves, II, 1891, 189 (Costa Rican references). 



Campylorhamphus Bertoni, 1901 (authority of Dr. C. W. Richmond). 



U. S. Nat. Museum : Guayabo (Ridgway and Zeledon), Jimenez 



(Alfaro). 

 Bangs Collection : Carrillo, Azahar de Cartago, El General de Terraba, 



Cariblanco de Sarapiqui (Underwood). Five skins. 

 C. H. Lankester Collection : Guacimo. 

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



Guapiles, La Hondura, El Hogar, Carrillo (Carriker). Nine skins. 



Type, No. 28075, Carnegie Museum ; adult male, El Hogar, Costa 

 Rica, March 17, 1907 ; M. A. Carriker, Jr. 



Similar to C. p. pusillus Sclater, of Colombia, but darker throughout, 

 more olive beneath, and with the streaks on the lower parts extending 



