BIRDS OP I^ORTH AND MIDDLE AMERICA. SI 6 



foreiiead white; under parts white, crossed by a pectoral or jugular 

 band of black, sometimes with the parts posterior to the latter brown, 

 tawny, or ochraceous; bill wholly black. 



Range. — Southern Mexico to eastern Ecuador, southeastern Brazil, 

 and Cayenne. (About ten species.) 



KEY TO THE SPECIES AND SUBSPECIES OP NOTHARCHUS. 



a. Larger (wing more than 95 mm.); a white collar across hindneck; tail without 

 white spots. 

 b. Forehead (more or less broadly) white; chest white, like throat; malar and sub- 

 orbital regions white. 

 c. Abdomen and under tail-coverts entirely immaculate white; black pectoral 

 band not contracted medially, immediately succeeded by pure white. 

 d. Forehead broadly white, the white involving superciliary region. (Noth- 

 archus hyperrhynchus .) 

 e. Bill larger (exposed culmen 47 mm.). (Amazon Valley.) 



Notharchus hyperrhynchus hyperrh5aichus (extralimital).« 

 ee. Bill smaller (exposed culmen, in adult male, 37-47, averaging 41.9 mm.). 

 (Southeastern Mexico to western Ecuador.) 



Notharchus hyperrhjmchus dysoni (p. 376). 



dd. Forehead narrowly white, the superciliary region black. (British Guiana 



to Lower Amazon Valley.).. Notharchus macrorhynchos (extralimital).& 



bb. Forehead black; chest black (like breast); malar and suborbital regions black. 



(Eastern Panama to central Colombia.) Notharchus pectoralis (p. 379). 



cc. Abdomen and under tail-coverts not immaculate white; black pectoral band 

 contracted medially, immediately succeeded by brown or ochraceous. 



« Bucco hyperrhynchus Sclater, Proc. Zool. Soc. Loud., 1855, 193, pi. 105 (Upper 

 Amazons; coll. Paris Mus.; ex T[amatia] hypen-hynchus Bonaparte, Ateneo Italiano, 

 ii, 1854, 128 (Consp. Volucr. Zygod., 1854, IS), (=nomen nudum); Mon. Jacamars and 

 Puff-birds, 1882, 71, pi. 22; Cat. Birds Brit. Mus., xix, 1891, 183.— Bucco dysoni 

 .hyperrhynchus Snethlage, Journ. fiir Orn., Jan., 1908, 20 (Rio Purus, w. Brazil). — 

 .N[otharchu^'\ hyperrhynchus Cabanis and Heine, Mus. Hein., iv, heft 1, 1863, 150. — 

 Bucco (Capito) giganteus Pelzeln, Sitz. Ak. Wien, Math. Natur. Class, xx, 1856, 498, 

 .511 (Marabitanas, Brazil). — Bucco giganteus Pelzeln, Orn. Bras., I Abth., 1868, 20. 



I have seen only two specimens of this form; one from Pard, the other erroneously 

 rascribed to Trinidad. So far as these two examples are concerned, the only difference 

 from N. dysoni that I can discover consists in the slightly larger general dimensions 

 :and relatively larger bill, and there can be no question that they represent merely 

 a slightly differentiated form of the same species. 



^ [Bucco] macrorhynchos Gmelin, Syst. Nat., i, pt. i, 1788, 406 (Cayenne; based on 

 lie plus grand Barbu a gros bee de Cayenne Buffon, PI. Enl., pi. 689; etc.). — Bucco 

 macrorhynchos Temm\T[ick, Cat. Syst., 1807, 55; Goffin, Mus., Pays-Bas, i, Buccones, 

 1863, 76. — Bucco macrorhynchu^ Sclater, Proc. Zool. Soc. Lond., 1854, 110; 1855, 106; 

 Mon. Jacamars and Puff-birds, 1882, 65, pi. 20; Cat. Birds Brit. Mus., xix, 1891, 181.— 

 €[apito] macrorhynchus Wagler, Syst. Av., 1827, Capito, sp. 2. — Tamatia macrorhynchu^ 

 Lesson, Traits d'Orn., 1831, 167. — C[yphos] mxicrorhynchtis Strickland, Ann. and Mag. 

 N- H., vi, 1841, 418. — N[otharchus] macrorhynchus Cabanis and Heine, Mus. Hein., 

 iv, iieft 1, 1863, 151. — C[yphos] macrorhynchus Cabanis and Heine, Mus. Hein., iv, 

 heft 1, 1863, 150, foot-note, in text. 



