Z MARMOSA. 



Genl. Char. Top of head smoky brown; broad line down center 

 of face paler; orbital markings black, extending to nose; upperparts 

 of body cinnamon; underparts cream color tinged with yellow; tail 

 dusky, lightest on apical half; hands and feet whitish; ears dark 

 brown. Ex type in United States National Museum. 



Measurements. Total, length, 338; tail, 188; hind foot, 24.5. 

 Skull: Occipito-nasal length, 40.5; zygomatic width, 22.7; intertem- 

 poral width, 5.8; length of nasals, 17.7; palatal length, 21; length of 

 upper molar series,. 6; length of mandible, 28.7; length of lower molar 

 series, 8. Ex type in United States National Museum. 



Marmosa z^ledoni Goldman. 



Marmosa zeledoni Goldm., Proc. Biol. Soc. Wash., XXIV, 1911, 

 p. 238. 



Type locality. Navarro, Costa Rica. 



Genl. Char. Near to M. americana, but more rufescent; inter- 

 parietal narrower. 



Color. Face light cinnamon-rufous; cheeks, sides of neck, flanks 

 reaching nearly to middle of belly ochraceous-buff; upperparts cin- 

 namon-rufous; throat, chest, middle of belly and inner side of limbs 

 yellowish white; tail light brown; hands brownish; hind feet whitish; 

 ear brown. Ex type in United States National Museum. 



Measurements. Total length, 345; tail, 168; hind foot, 23. 

 Skull: Occipito-nasal length, 33.9; Hensel, 29; zygomatic width, 

 19.2; intertemporal width, 6.5; length of nasals, 16.2; length of 

 upper molar series, 11.7; length of palate, 18.2; length of mandible, 

 23.8; length of lower molar series, 12.7. Ex type in United States 

 National Museum. 



Marmosa isthmica Goldman. 



Marmosa isthmica Goldm., Smith. Misc. Coll., LVI, 1912, No. 36, 

 p. i. 



Type locality. Rio Indio, near Gatun, Canal Zone, Panama. 



Genl. Char. Size large; skull similar to that of M. chapmani, but 

 rostrum narrower; teeth and audital processes of alisphenoid smaller. 



Color. Head and upperparts brownish cinnamon; middle of face 

 lighter; orbital ring black; sides of neck and flanks ochraceous-buff; 

 underparts creamy buff; tail above light brownish, beneath tawny 

 ochraceous; hands brownish to base of fingers; toes and hind feet 

 whitish; ears brown. Ex type in United States National Museum. 



Measurements. Total length, 385; tail, 215; hind foot, 28. 



