32O BROOKLYN INSTITUTE MUSEUM. SCIENCE BULLETIN 2. 6. 



c'. Head and back thickly barred with black lines Bucco capensis. 



a'. Without black bands across breast although the throat and breast may 



be blackish. 

 b. Throat chestnut or hazel brown. 



c. Feathers of breast and sides with broad terminal black spots or 



bands Nystactes tamatia lamatia. 



c'. Feathers of breast and sides without terminal black spots or bands . Nonnula duidae. 

 b'. Throat slate gray or black. 



C. Bill black; rump white Chelidoptera tenebrosa. 



c'. Bill red ; rump slate gray like back Monasa ttigra. 



Bucco CAPENSIS Linnaeus. 

 Bucco capensis L., Syst. Nat. ed. 12. 1766. p. 168; Berlepsch & Hartert, 



p.. 102. 



This species was met with on my first expedition, only a single 

 specimen, an adult female collected at the Alataben Rapids, 1 February 

 2, 1899. 



NOTHARCHUS HYPERRHYNCHUS DYSONI (Sclater). 



Bucco dysoni Sclater, P. Z. S. 1885 : p. 193 (Honduras); Stone, Proc. 



Ac. Nat. Sci. Phil. 1913: p. 199 (Manimo River). 

 Notharchus hyperrhynchus dysoni Ridgway, Birds N. & M. Am. VI : 



1911: 376. 



Stone records this species from the delta region. 



NOTHARCHUS TECTUS TECTUS (Boddaert). 

 Bucco tectus Bodd., Tabl. PI. Enl. 1783. p. 43; Berlepsch & Hartert, 



p. IO2. 



B[ucco] t[ectus] tectus Hellm., P. Z. S. Part IV. 1911, 1195 (Caura 



River). 



Not observed on the Orinoco. Berlepsch and Hartert record speci- 

 mens collected by Klages at Suapure and at La Pricion on the Caura 

 River. 



ARGICUS MACRODACTYLUS cAURENsis Cherrie. 

 Argicus macrodactylus caurensis Cherrie, Bui. Am. Mus. Nat. Hist., 



XXXV. 1916, p. 389. 

 Bucco macrodactylus Berlepsch & Hartert, p. 102. 



Rare. One taken, an adult male, at Maipures, December 21, 1898. 



The eye is liver brown; bill black; feet smoke grey. 



NYSTACTES TAMATIA TAMATIA (Gmelin). 



Bucco tamatia Gm., Syst. Nat. I. 1788. p. 405; Berlepsch & Hartert, 

 p. 102. 



'The Mataben Rapids are above the falls of Maipures, between that point and the mouth of the 

 Vichada River. 



