BIEDS OF NOETH AND MIDDLE AMERICA. 875 



forehead white; under parta 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 OF NOTHAECHUS. 



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

 white spots. 

 6. 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- 

 archiis hyperrhyndms.) 

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



Notharohus liyperrliyiichus hyperrhynchus (extralimital)." 

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

 (Southeastern Mexico to western Ecuador.) 



Notharohus hyperrhynchus dysoni (p. 376). 



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



to Lower Amazon Valley.).. Notharohus macrorhynchos (extralimital).* 



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



(Eastern Panama to central Colombia.) Notharohus peotoralis (p. 379). 



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

 contracted medially, immediately succeeded by brown or ochraceous. 



" Bucco hyperrhyndms Sclater, Proc. Zool. Soc. Lond., 1855, 193, pi. 105 (Upper 

 Amazons; coll. Paris Mus. ; ex T[amatia.] hyperrhynchus Bonaparte, Ateneo Italiano, 

 ii, 1854, 128 (Consp. Volucr. Zygod., 1854, li),{=nom,ennvdwm); Mon. Jacamarsand 

 Puff-birds, 1882, 71, pi. 22; Cat. Birds Brit. Mus., xix, 1891, 183.— 5mcco dysoni 

 hjperrhyru^us Snethlage, Journ. fiir Orn., Jan., 1908, 20 (Bio Purds, w. Brazil). — 

 N[o1haTdms'\ 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 

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

 from JV. 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. 



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

 Le.plus grand Barbu h gros bee de Cayenne Bufion, PI. Enl., pi. 689; etc.). — Bucco 

 macrorAyncAos Temminck, Cat. Syst., 1807, 55; Goffin, Mus., Pays-Bas, i, Buccones, 

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

 Mon. Jacamarsand Puff-birda, 1882, 65, pi. 20; Cat. Birds Brit. Mus., xix, 1891, 181.— 

 C[apito] maerorhynchus Wagler, Syst. Av., 1827, Capito, sp. 2. — Tamatia maerorhynchus 

 Lesson, Trait6 d'Om., 1831, 167. — Cfyphos] maerorhynchus Strickland, Ann. and Mag. 

 N. H., vi, 1841, 418. — N[otharchus] macrorhyn<ihus Cabanis and Heine, Mus. Hein., 

 iv, heft 1, 1863, 151. — C\i/phos] macrorhyndius Cabanis and Heine, Mus. Hein., iv, 

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



