Todd-Carriker : Birds of Santa Marta Region, Colombia. 223 



Marta). — Sharpe, Cat. Birds Brit. Mus;, XVII, 1892, 321 (Santa Marta). — 

 Salvin and Godman, Biol. Centr.-Am., Avesy II, 1895, 459 (Santa Marta, iri 

 range). — Bangs, Proc. Biol. Soc. Washington, XII, 1898, 133 (" Santa 

 Marta"). — Bangs, Auk, XVI, 1899, 137, in text ("Santa Marta"). — Allen, 

 Bull. Am. Mus. Nat. Hist, XIII, 1900, 135 (Bonda). — Thayer and Bangs, 

 Bull. Mus. Comp. Z06I., XLVI, 1906, 215, in text ("Santa Marta"; crit.). 



Momotus momota subrufescens Allen, Bull. Am. Mus. Nat. Hist., V, 1893, 

 125 ("Santa Marta"). — Hellmayr and von Seilern, Arch. f. Naturg., 

 LXXVIII, 1912, 155, in text (Santa Marta, in range; crit.; ref. orig. descr.)., 



Momotus bahamensis subrufescens Hellmayr, Nov. Zool., XIII, 1906, 41, in 

 text (Santa Marta, in range; crit.). 



Momotus subrufescens subrufescens Ridgway, Bull. U. S. Nat. Mus., No. 50, 

 VI, 1914, 455 (diag. ; range; references), 462, footnote ("Santa Marta"; 

 meas.). — Chapman; Bull. Am. Mus. Nat. Hist., XXXVI, 1917, 271 ("Santa 

 Marta "; crit.). 



Additional records: Tucurinca (Carriker). 



Twenty-five specimens : Bonda, Mamatoco, La Tigrera, Santa Marta, 

 Las Vegas, Fundacion, and Don Diego. 



A study of this fine series has led to several conclusions, which 

 seem worthy of record. First, M. subrufescens is clearly specifically 

 distinct from M. momota, differing in smaller size, larger amount of 

 terminal black on the rectrices, distinctly greenish throat, more rufes- 

 cent posterior under parts, paler, more buffy-tinged upper parts, and 

 more concealed, more cinnamon rufous area behind the nape-cincture, 

 which latter also averages narrower. , Second, among the forms studied 

 in this connection, M. subrufescens seems most closely" allied to M. 

 nattereri, but should probably be kept specifically distinct therefrom. 

 Unfortunately we have not seen' either M. microstephanus or M.- igno- 

 bilis. Third, there is one specimen (No. 44,411) from Don Diego, on 

 the north coast, which differs so decidedly from the general run as to 

 suggest that it may represent a local form. It is very richly colored 

 below, about like M. bahamensis, and above is strongly shaded with 

 the same rich rufous tawny color as overspreads the upper parts in 

 M. s. conexus Thayer and Bangs (which we find no difficulty in distin- 

 guishing when smoothly made up specimens are compared) , which, on 

 the other hand, is purer green above than the typical form. 



This is strictly a Tropical Zone species, ranging over the whole of 

 the lowlands from Dibulla to Fundacion, as well as those of the Rio 

 Cesar-Rio Rancheria Valley. It is essentially littoral in its local dis- 

 tribution, for while it ascends into the hills in some places up to 3,000 

 16 



