60 ORYZOMVS. 



temporal width, 6.7; length of nasals, 12; palatal length, 6.7; length 

 of upper molar series, 4.9; length of mandible, 17.1; length of lower 

 molar series, 5. Ex type in United States National Museum. 



Oryzomys gatunensis Goldman. 



Oryzomys gatn>icnsis Goldman, Smith. Misc. ColL.LVI, No. 36, 

 1912, p. 7. 



Type locality. Gatun, Canal Zone, Panama. 



Genl. (.'liar. Similar to 0. richmondi but paler; skull wider between 

 orbits; interparietal smaller. 



Color. Face brownish; head and upperparts grizzled black and 

 raw-umber; flanks buffy; underparts pinkish buff, plumbeous of 

 under fur showing through; hands and feet flesh color; tail above 

 grayish brown, beneath paler. Ex type in United States National 

 Museum. 



Measurements. Total length, 224; tail, 115; hind foot, 31.5. 

 Skull: Occipito-nasal length, 26.6; Hensel, 20.8; zygomatic width, 

 14.5; intertemporal width, 5.3; length of nasals, 10.2; palatal length, 

 5.2; length of upper molar series, 4.7; length of mandible, 12.9; 

 length of lower molar series, 5.1. Ex type in United States National 

 Museum. 



Oryzomys nicaraguae Allen. 



Oryzomys nicaragua Allen, Bull. Am. Mus. Nat. H'st., XXVIII, 

 1910, p. 100. , 



Type locality. Vijagua, Nicaragua. 



Color. Head and upperparts light ochraceous-buff and black; 

 flanks light ochraceous-buff; chin and throat white; pectoral region 

 buffy white, abdominal region grayish white; tail above blackish, 

 beneath paler; hands white, feet pale brown. Ex type in American 

 Museum of Natural History. 



Measurements. Total length, 180; tail, no; hind foot, 20. 

 Skull: Total length, 21.3; Hensel, 15.4; zygomatic width. 11; width 

 of braincasc, 10; length of nasals, 8.6; length of upper molar series, 3; 

 length of mandible, 9.7; length of lower molar series, 3. Ex type in 

 American Museum of Natural History. 



Oryzomys ochraceus Allen. 



Oryzomys ochraceus Allen, Bull. Am. Mus. Nat. Hist., XXIV, 

 1908, p. 655. 



Type locality. Rio Grande, Nicaragua. 



Color. Head and uppcrparts ochraceous mixed with black on 

 dorsal region; flanks ochraceous-buff; underparts buff; hands and 



