218 Proceedings of the Biological Society of Washington. 
Rhynchocyclus scotius Oberholser, Proc. U. 8S. 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);! southern Venezuela (Caura River and near Mt. Duida); 
British Guiana (Mazaruni River); S. E. Colombia (Florencia and Buena 
Vista) ;? Ecuador (Sarayacu and Balzar Mts.); eastern Peru (Zeberas and 
Chamicuros). 
Rhynchocyclus sulphurescens berlepschi Hartert & Goodson. 
Rhynchocyclus sulphurescens berlepschi Hartert & Goodson, Novit. Zool., 
XXIV, 1917, p. 415 (Caparo, Trinidad I., W. [.). 
Range: Trinidad; coast of northeastern Venezuela?? 
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 cherriet Hartert & Goodson, Novit. Zool., 
XXIV, 1917, p. 414 (Cayenne). 
Range: French Guiana; Dutch Guiana. 
I am doubtful as to the validity of thisform. I have not seen specimens 
from Cayenne, but Hartert & Goodson record it also from British Guiana 
and Caura River, Venezuela. Iam 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 FR. s. assimilis or restrict its 
range provisionally to French Guiana and Dutch Guiana. 
Rhynchocyclus sulphurescens exortivus Bangs. 
Rhynchocyclus sulphurescens exortivus Bangs, Proc. Biol. Soe. Wash., 
XXiI, 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. 8. 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., VI, 
1863, p. 8 (Lion Hill, Panama). 
Range: Panama. 
1Recorded by Snethlage, Bol. Mus. Goeldi, VIII, 1914, vo. 394. Ihave examined a 
specimen from Utinga, near Para, in the American Museum of Natural History. 
2Not typical (cf. Chapman, Bull. Amer. Mus. Nat. Hist., XXXVI, 1917, p. 435). 
2Cumané and Puerto Cabello, Venezuela, were included by Hartert & Goodson in the 
range of thisform. I have not seen specimens from Cuman4, but examples from the region 
of Puerto Cabello are certainly nearer exortivus. 
