BIRDS OF NORTH AND MIDDLE AMERICA 133 



rior margin of the eye to the side of the throat; the upper wing coverts 

 scapulars, back, and wing feathers with broader terminal bands of 

 cinnamon-buff, and, on the upper wing coverts, russet; the tips fading 

 to white externally; upper tail coverts white; tail as in subadult or 

 adult; bill anterior to cere black; base of bill including the mandibular 

 rami, the lores and rim of the eyelids zinc orange; iris liver brown; 

 tarsus and toes dull yellow ocher; claws black. 



Natal down: — Avellaneous washed with mouse gray, banded with 

 deep mouse gray (the only specimen seen was partly in juvenal 

 plumage and showed the natal down only on the lower breast abdomen 

 and thighs) the upperparts^ said to be more ochraceous; iris brown. 



Adult male.~Wmg 325-341 (332.5); tail 164-182 (172.1); culmen 

 from the cere 24.5-26.5 (25.2); culmen including the cere 31-33 

 (32.1); tarsus 49-54 (51.5 mm.) (6 specimens). 



Adult female.— Wing 338-350 (342); tail 167.5-188 (175); cu'men 

 from cere 24-25 (24.6); culmen including cere 31-33 (31.6); tarsus 

 47-51 (49 mm.) (3 specimens). 



/^angre.— Nicaragua (Los Sdbalos, Ometipi), Honduras, Costa Rica, 

 and eastern Panama south through South America to Uruguay and 

 central Argentina, Paraguay, Bohvia, but in the west not recorded 

 south of Ecuador (Yaguachi Marshes). 



Type locality.— CoTvientes and KIo de la Plata. 



Herpetotheres sociabilis Vieillot, Nouv. Diet. Hist. Nat., xviii, 1817, 318 (district 

 of Corrientcs and Rio de La Plata, Argentina, between lat. 29° and 30° S.). 



Rosthramus sociabilis d'Orbigny, Voy. Am6r. Merid., iv, 1837, 73 (Corrientes to 

 Paraguay and to Buenos Aires). — d'Orbignt and LaFresnaye, Synop. 

 Avium, 1837, 3 (Corrientes).— Lawrence, Ann. Lye. Nat. Hist. New York, 

 ix, 1868, 134 (Gulf of Nicoya, Costa Rica).— Nutting, Proc. U. S. Nat. 

 Mus., vi, 1884, 395 (Ometepe, Nicaragua).— Frantzius, Journ. fur Orn., 

 1869, 369 (Costa Rica). — Koenigswald, Journ. fur Orn., 1896, 386 (Brazil; 

 Sao Paulo).— Bruch, Rev. Mus. La Plata, xi, 1904, 251 (Santa Catalina,' 

 Prov. Jujuy, Argentina). — Ihering, Rev. Mus. Paulista, vi, 1904, 338 

 (Paraguay).— Ihering and Ihering, Aves Brazil, 1907, 96 part, 410 (crit.).- 

 Bertoni, Anal. Soc. Cient. Argentina, Ixxv, 1913, 80 (Missiones, Argen- 

 tina).— Delacour, Ibis, 1923, 145 (near San Fernando de Apure, Vene- 

 zuela; habits). 



Rostrhamus SGciabilis Kaup, Isis, 1847, 352 (monogr.), 370, 375, 381; in Jardine's 

 Contr. Orn., 1850, 78.— Gray, List Spec. Brit. Mus., pt. 1, Accip., ed. 2 

 1848, 47 (South America); Hand-list, i, 1869, 27, No. 251, part (includes 

 Helicolestes hamatus!). — Sclater, Proc. Zool. Soc. London, 1858, 60 (e. 

 Ecuador); 1860, 289 (Bobahoyo, Ecuador).— Berlepsch, Journ. fiir Orn., 

 1873, 283 (Santa Catarina, s. Brazil; crit.; geogr. range; synonymy); Proc. 

 Zool. Soe. London, 1885, 119 (Babahoyo, Ecuador); Journ. fur Orn., 1887, 

 133.— Sclater and Salvin, Nom. Av. Neotr., 1873, 121, part (South 

 America; Central America); Proc. Zool. Soc. London, 1879, 541 (Remedios, 

 Colombia).— Durnford, Ibis, 1877, 188 (Prov. Buenos Ayres, Argentina; 

 habits).— Gibson, Ibis, 1879, 413 (Cape San Antonio, Buenos Aires; habits; 

 eggs).— Gurney, Ibis, 1879, 337 (crit. as to specific names), 341 (synonymy); 



