50 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 69 



near sea level to over 4.000 feet in altitude. Anthony noted the fact 

 that the males were much larger than the females. 



Specimens examined: Boquete, i *; Cana, 14; Gatun, 7'; Maxon 

 Ranch (Rio Trinidad), 2'; Real de Santa Maria, 4'; Rio Indio 

 (type locality), i ; Tacarcuna (2,650-4,200 feet), 33'; Tapalisa, 2.* 



MARMOSA MEXICANA SAVANNARUM Goldman 



Savanna Marmosa 



Martnosa mexicana savannarum Goldman, Proc. Biol. Soc. Washington, 

 Vol. 30, p. 108, May 23, 1917. Ty^t from Boqueron, Chiriqui, Panama. 



Specimens of this little opossum were recorded by Bangs (1902, 

 p. 19) as Marmosa mexicana from Bugaba, and by Allen (1904, 

 p. 56) as Marmosa murina mexicana from Boqueron, Chiriqui. On 

 comparison with subsequent accessions of material from various 

 localities these specimens appear to represent a geographic race dis- 

 tinguished by small size and pale coloration, the latter character 

 shared with other mammals inhabiting the same generally open 

 savanna region, and evidently the result of the environmental con- 

 ditions prevaiHng. This pallid subspecies may range along the 

 Pacific coast of Panama as far east as the Bayano River where the 

 savannas end abruptly. 



Specimens examined: Roqueron, 2 ^ ; Bugaba, 3.^ • 



MARMOSA FULVIVENTER Bangs 



Fulvous-bellied Marmosa 



Mannosa fuh'iveutcr Bangs, Amer. Nat., Vol. 35, p. 632. August, 1901. Type 

 from San Mig-uel Island, Panama. 



The fulvous-bellied marmosa is an insular representative of the 

 group to which M. isthmica Goldman of the adjacent mainland ' 

 belongs. It differs from that animal in darker color, the underparts 

 being deep buff or fulvous instead of cream buff" or pinkish buff. It 

 is known only from five specimens collected on the islands of San 

 Miguel and Saboga by W. W.'Brown, Jr., in the spring of 1900. 



The example from Saboga, a small island in the northern part of 

 the archipelago, is slightly paler throughout than specimens from 

 San Miguel and may represent an unrecognized form. The incom- 

 plete skull, however, is not very appreciably different. 



Specimens examined : Saboga Island, i ^ ; San Miguel Island, 4.* 



* Collection Mus. Comp. Zool. 



* Collection Amer. Mus. Nat. Hist. 



