BUCCO DYSONL 



DYSON'S PUFF-BIED. 

 PLATE XXI. 



Capito macrorhynchus, Tsch. F. P. Aves, p. 249 (1845). 



Bucco macrorhynchus, Scl. P. Z. S. 1854, p. 110. 



Tamatia gigas, Bp. Consp. Vol. Zyg. p. 13 (1854). 



Bucco dysoni, Scl. P. Z. S. 1855, p. 193. 



Bucco leucocrissus, Scl. P. Z. S. 1860, p. 284. 



Bucco dysoni, Scl. et Salv, Ibis, 1860, p. 40. 



Bucco dysoni, Lawr. Ann. L. N. Y. vii. p. 318 (1861). 



Bucco dysoni, Scl. Cat. A. B. p. 269, et 



Bucco leucocrissus, Scl. ibid., et 



Bucco napensis, Scl. ibid. (1862). 



JSfotharchus dysoni. Cab. et Hein. Mus. Hein. iv. p. 149, et 



Notharchus albicrissus, Cab. et Hein. torn. cit. p. 151, et 



Notharchus napensis. Cab. et Hein. torn. cit. p. 152 (1863). 



Bucco dysoni, Scl. et Salv. P. Z. S. 1864, p. 363. 



Bucco dysoni, Scl. P. Z. S. 1870, p. 201. 



Bucco dysoni, Salv. Ibis, 1872, p. 322. 



Bucco dysoni, Scl. et Salv. Nomencl. p. 105 (1873). 



Suprk niger, fronte lata supra oculos extensa et torque colli postici necnon plumarum dorsi et scapularium 

 marginibus angustissimis albis; subtus albus, torque subpectorali lato et subalaribus nigris, liypo- 

 chondriis albo et nigro transfasciatis ; remigum rectricumque pagina inferiore cineracea, illorum 

 pogoniis internis basin versus albis; rostro uigro, pedibus fuscis : long, tota 9*5, alae 4*7, caudae 3'5, 

 rostri a rictu 0"8. 



Hub. in America centralis Columbia, ^Equatoria, et AmazoniS, superiore. 



Obs. B. macrorhyncho maxime aflSnis, sed fronte latiore albS, et ventre non fulvo tincto distinguendus. 



The species that replaces Bucco macrorhynchus of the Guianas in Upper Amazonia, and extends 

 thence through Ecuador and Colombia into Central America, is slightly variable, and has received 

 from me three different names, based upon specimens from three different localities. These three 

 local forms I think it better, after having had the advantage of a considerable series for com- 

 parison, to unite as one species, v^^hich, although coming very near the Guianan bird, may, I think, 

 always be distinguished by the characters above pointed oilt. 



In 1855 I first published a description of this bird in an article, read before the Zoological 

 Society, upon some members of the group additional to those contained in my Synopsis of the 



