ORYZOMYS. 59 



Type locality. Near head of Rio Limon, Mount Pirri, Panama. 

 Altitude, 4,500 feet. 



Genl. Char. Similar to O. devius, but darker, 



Color. Top of head and upperparts Mars-brown, darkest on 

 median line from top of head to tail; cheeks paler, rufescent, as are 

 also shoulders and flanks; throat grayish; rest of uiiderparts dark 

 ochraceous-buff ; base of fur plumbeous; outer side of limbs dark 

 brownish, a buffy line from wrists to lower edge of forearm; tail above 

 dark brown, beneath paler; hands blackish, fingers lighter; hind feet 

 dark brown, toes with tufts of silvery hairs at end of longest four; 

 ears blackish. Ex type in United States National Museum. 



Measurements. Total length, 340; tail, 185; hind foot, 38. 

 Skull: Occipito-nasal length, 37.3; Hensel, 28.7; zygomatic width, 

 20; intertemporal width, 6; length of nasals, 14; length of upper molar 

 series, 6; length of mandible, 19.6; length of lower molar series, 6.1. 

 Ex type in United States National Museum. 



Oryzomys carrikeri Allen. 



Oryzomys carrikeri Allen, Bull. Am. Mus. Nat. Hist., XXIV, 1908, 

 p. 656. 



Type locality. Rio Sicsola, Talamanca. Costa Rica. 



Color. Head and upperparts Mars-brown lined with light ochra- 

 ceous-buff, darkest on dorsal region; flanks ochraceous-buff; outer 

 side of limbs Mars-brown; uiiderparts and inner side of limbs gray- 

 ish white; tail dark brown, beneath slightly paler; hands white; feet 

 pale brown. Ex type in American Museum of Natural History. 



Measurements. Total length, 265; tail, 133; hind foot, 30.5. 

 Skull: Total length, 31.5; intertemporal width, 5; zygomatic width,. 

 14.7; length of nasals, 12; length of molar series, 5; length of man- 

 dible, 17.1; length of lower molar series, 5.2. Ex type in American 

 Museum of Natural History. 



Oryzomys frontalis Goldman. 



Oryzomys frontalis Goldman, Smith. Misc. Coll., LVI, No. 36, 



i 



1912, p. 6. 



Type locality. Corozal, Canal Zone, Panama. 



Genl. Char. Similar to 0. flavicans, but larger and darker. 



Color. Head cinnamon-rufous and dusky; upperparts cinnamon- 

 rufous; flanks paler; underparts, lips and inner side of limbs white; 

 hands brownish ; feet white ; tail dusky above and below ; ears brown- 

 ish. Ex type in United States National Museum. 



Measurements. Total length, 309; tail, 161; hind foot, 30. Skull: 

 Occipito-nasal length, 35.1; Hensel, 27; zygomatic width, 18; inter- 



