364 Field Museum of Natural History — ZoOlogy, Vol. XIII. 



Range: Colombia and Venezuela, southward to Ecuador, Peru, 

 Bolivia and northwestern Brazil, 

 i: Peru (Yurimaguas). 



Ramphastos citreolaemus Gould. Yellow-throated Toucan. 



Ramphastos citreolcemus Gould, Proc. Zool. Soc. Lond., 1843, p. 147 (Bogotd, 

 Colombia); Id., Mon. Ramphastidae, ed. 2, 1854, pi. 9 and text; Wyatt, Ibis, 

 1871, p. 379 (Colombia); Sclater and Salvin, Proc. Zool. Soc. Lond., 1879, 

 P- 537 (Antioquia, Colombia); Chapman, Bull. Am. Mus. Nat. Hist., XXXVI 

 191 7. P- 330. pl- XXXVIII, fig. 3 (Puerto Valdivia; La Frijolera; Puerto 

 Berrio; Malena; west of Honda, Colombia). 



Rhamphastos cilreolcBmus Sclater, Cat. Bds. Brit. Mus., XIX, 1891, p. 131. 



Range: Colombia. 



Ramphastos osculans Gould. Osculant Toucan. 



Ramphastos osculans Gould, Proc. Zool. Soc. Lond., 1835, p. 156 (Brasil = Rio 

 Negro, northern Brazil, by designation)"; Id., Mon. Ramphastidae, ed. i, 

 1834, pi. 5 and text; /d.,ed. 2, 1854, pi. 10 and text; Berlepsch and Hartert, 

 Nov. Zool., IX, 1902, p. 100 (Munduapo, upper Orinoco); Berlepsch, Nov. 

 Zool., XV, 1908, p. 281 (Cayenne); Hellmayr, Nov. Zool. XVII, 1910, p. 

 397 (Borba, Rio Madeira); Cherrie, Mus. Brooklyn Inst. Arts & Sci., Sci. 

 Bull., II, No. 6, 1916, p. 317 (Munduapo); Chubb, Bds. Brit. Guiana, I, 

 1916, p. 445. 



Range: Northern Brazil, Venezuela and Guiana. 



Ramphastos theresae'' Reiser. Theresa's Toucan. 



Ramphastos theresas Reiser, Anz. Ak. Wiss. Wien, 1905, No. XVIII, p. 322 (Rio 

 Paranahyba, Piauhy, northeastern Brazil); Brabourne and Chubb, Bds. 

 So. Am., I, 1912, p. 157, No. 1534. . 



Range: Northeastern Brazil. 



*Ramphastos ariel Vigors. Ariel Toucan. 



Ramphastos ariel Vigors, Zool. Journ., II, 1826, p. 466 (Rio de Janeiro); Des- 



courtilz, Orn. Bras., 1852, pi. 12, fig. i; Gould, Mon. Ramphastidae, ed. 



1, 1834, pi. 10 and text; Id., ed. 2, 1854, pi. 12 and text; Hellmayr, Nov. 



Zool., XIII, 1906, p. 380 (Prata, Distr. of Pard); Id., Abh. K. Bayer. Akad. 



Wiss., Munchen, XXVI, 2, 1912, p. 95 (Pard District). 

 Rhamphastus artel Goeldi, Ibis, 1903, p. 498 (Rio Capim). 

 Rhamphastos ariel Sclater, Cat. Bds. Brit. Mus., XIX, 1891, p. 131; Goeldi, 



Alb. Aves Amazon, pt. I, 1900, pi. 11, figs. 4a, 4b; Hellmayr, Nov. Zool., 



» Cf. Berlepsch and Hartert, /. c. 



*> Ramphastos theresce Reiser: Intermediate between R. osculans and R. ariel. 

 Differs from osculans in having a light blue spot at the base of the upper mandible 

 (instead of a white stripe) ; differs from ariel by the saffron instead of red upper tail 

 coverts, whitish yellow cheeks and small red spot on breast; bill smaller. 



