218 Proceedings of the Biological Society of Washington. 



Rhynchocyclus scotius Oberholser, Proc. U. S. Nat. Mus., XXV, 1902, 

 p. 63 (Brazil). 



Range: Brazil (Borba to Rio Madeira; Manaos, Rio Negro; Upper Rio 

 Roosevelt and Amazonian region; Itacoatiara; Rio Tocantins; Rio Tapajoz, 

 etc., to Para); 1 southern Venezuela (Caura River and near Mt. Duida); 

 British Guiana (Mazaruni River); S. E. Colombia (Florencia and Buena 

 Vista); 2 Ecuador (Sarayacu and Balzar Mts.); eastern Peru (Zeberas and 

 Chami euros) . 



Rhynchocyclus sulphurescens berlepschi Hartert & Goodson. 



Rhynchocyclus sulphurescens berlepschi Hartert & Goodson, Novit. ZooL, 



XXIV, 1917, p. 415 (Caparo, Trinidad I., W. I.). 

 Range: Trinidad; coast of northeastern Venezuela? 3 

 Very close to R. s. assimilis, but all Trinidad specimens I have seen ap- 

 pear to have the crown more olivaceous, less grayish, than in assimilis. 



Rhynchocyclus sulphurescens cherriei Hartert & Goodson. 



Rhynchocyclus sulphurescens cherriei Hartert & Goodson, Novit. Zool., 

 XXIV, 1917, p. 414 (Cayenne). 



Range: French Guiana; Dutch Guiana. 



I am doubtful as to the validity of this form. I have not seen specimens 

 from Cayenne, but Hartert & Goodson record it also from British Guiana 

 and Caura River, Venezuela. I am unable to distinguish birds from British 

 Guiana and Caura River, Venezuela, from examples from Itacoatiara, mid- 

 dle Amazon River, and Utinga, near Para, and am, therefore, forced either 

 to not recognize the form as separable from R. s. assimilis or restrict its 

 range provisionally to French Guiana and Dutch Guiana. 



Rhynchocyclus sulphurescens exortivus Bangs. 



Rhynchocyclus sulphurescens exortivus Bangs, Proc. Biol. Soc. Wash., 



XXI, 1908, p. 163 (La Concepcion, Sierra Nevada de Santa Marta, 



N. Colombia). 



Range: Northern and northeastern Colombia (Santa Marta region and 



lower Magdalena River); northern Venezuela (Colon, Tachira; Orope and 



Encontrados, Zulia; Caracas). 



R. s. exortivus Bangs differs from R. s. assimilis in having the back de- 

 cidedly brighter (more greenish); crown more olivaceous and throat and 

 breast decidedly more yellowish. (Type examined.) 



Rhynchocyclus sulphurescens flavo-olivaceus (Lawrence). 



Rhynchocyclus flavo-olivaceus Lawrence, Ann. Lye. Nat. Hist. N. Y., VIII, 



1863, p. 8 (Lion Hill, Panama). 

 Range: Panama. 



iRecorded by Snethlage, Bol. Mus. Goeldi, VIII, 1914, o. 394. I have examined a 

 specimen from Utinga, near Para, in the American Museum of Natural History. 



2Not typical (c/. Chapman, Bull. Amer. Mus. Nat. Hist., XXXVI, 1917, p. 435). 



3Cumana and Puerto Cabello, Venezuela, were included by Hartert & Goodson in the 

 range of this form. I have not seen specimens from Cumana, but examples from the region 

 of Puerto Cabello are certainly nearer exortivus. 



