902 Annals of the Carnegie Museum. 



"Five adult females differ in having the black pectoral band more re- 

 stricted. Birds in juvenal and first winter plumage have black bills. 

 One specimen from Pozo Aziil shows a very decided tinge of rufous on 

 the back, similar to the type of A. rufidor salts Cassin, which we have 

 examined." (W. E. C. Todd.) 



This species is very abundant throughout the Pacific lowlands, inhabit- 

 ing the heavy forests, and keeping near the ground. It is usually seen 

 in pairs. A nest containing young was found near Pozo Azul, which 

 was placed in about the same situation as that described under the 

 following subspecies, A. aurantiirostris rufidorsalis. 



738. Arremon aurantiirostris rufidorsalis (Cassin). 



Arremon rufidorsalis Cassin, Proc. Ac. Nat. Sci. Phila., 1865, 170 (Turrialba, 

 May 24, 1865 [J. Carmiol]). — Lawrence, Ann. Lye. N. Y., IX, 1868, 102 

 (Turrialba [F. Carmiol]). 



Arremon rufidorsalis Salvin, Ibis, 1874, 308, crit. 



Arremon aurantiirostris Boucard, Proc. Zool. Soc. Lond., 1878, 56 (San Carlos). 

 — Zeledon, Cat. Aves de C. R., 1882, 8. — Salvin and Godman, Biol. Centr. 

 Am., I, 1884, 324, part (Tucurriqui [Arce], Turrialba [Carmiol]). — Sclater, 

 Cat. Birds Brit. Mus., XI, 1886, 275, part (Tucurriqui [Arce]). — Zeledon, 

 An. Mus. Nac. de C. R., I, 1887, in, part (Jimenez and Pacuare). — Rich- 

 mond, Proc. U. S. Nat. Mus., XVI, 1893, 490, part (Rio Frio). — Ridgway, 

 Birds North and Mid. Amer., I, 1901, 455, part (southern Mexico through 

 Central America to Panama Railroad). 



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

 Bangs Collection: Carrillo, Tenorio (Underwood). 



C. H. Lankester Collection: Cachi, Cariblanco de Sarapiqui, El Hogar. 

 Carnegie Museum: Carrillo, El Hogar, Guapiles, Volcan de Turrialba 



(2,000 feet), Cuabre, and Rio Sicsola (Carriker). Fifteen skins. 



After a careful examination of the large series of specimens from both 

 the Caribbean and Pacific lowlands it became at once very evident that 

 the form described by Mr. Cherrie under the name A. aurantiirostris 

 saturates is a good one, all the characters pointed out by him holding good 

 throughout the series, British Honduras birds also agreeing with it in all 

 particulars. Unfortunately his name cannot be used for this race, since 

 Mr. Cassin in 1865 described a specimen from the range of this bird under 

 the name rufidorsalis. The eastern bird is distinguished from the western 

 form by having the black much darker (dark olive-green, not yellowish- 

 olive), the median crown stripe of ashy much broader; the superciliary 

 line wider, pure white, and extending for its full width nearly to the nos- 

 tril ; the abdominal white area is slightly larger. 



