ORYZOMYS. 241 



222. zygomaticus (Oryzomys), Merr., Proc. Wash. Acad. Scien., in, 



1901, p. 285. 

 GUATEMALAN RICE RAT. 



Type locality. Nenton, Guatemala. 



Geogr. Distr. Guatemala. 



Genl. Char. Size medium; hind feet large. Skull: superciliary 

 ridges strongly developed and everted; zygomata curving down- 

 ward below level of posterior root. 



Color. Above pale fulvous, lined with black on dorsal portion; 

 under parts white, suffused with buff. 



Measurements. Total length, 290; tail vertebrae, 152; hind 

 foot, 33. 



223. cozumelse (Oryzomys), Merr., Proc. Biol. Soc. Wash., xiv, 



1901, p. 103. 

 COZUMEL ISLAND RICE RAT. 



Type locality. Cozumel Island, Yucatan, Mexico. 



Genl. Char. Size large, similar to O. aquaticus. Skull: braincase 

 broad posteriorly, carrying lateral beads outwards. 



Color. Above grayish bistre; sides and rump suffused with pale 

 fulvous; beneath whitish to pale salmon; tail dusky above, paler 

 beneath; ears dark brown. 



Measurements. Total length, 332; tail vertebras, 182; hind 

 foot, 35. 



224. panamensis (Oryzomys} , Thomas, Ann. Mag. Nat. Hist., yth 



Ser., vin, 1901, p. 252. 

 PANAMA RICE RAT. 



Type locality. Near city of Panama, Panama. 



Genl. Char. Size large; tail about equal to head and body; fur 

 soft. Skull: supraorbital ridges without heavy beads; molars 

 small, narrow. 



Color. Upper parts tawny ochraceous, lined with black; sides 

 lighter; under parts grayish; outer sides of arms and legs gray; tail 

 brown above, white below; hands and feet whitish; ears brown. 



Measurements. Total length, 261; tail, 130; hind foot, 28.5; ear, 

 1 8. Skull: tip of nasals to front of interparietal, 28.5; zygomatic 

 breadth, 16.4; interorbital constriction, 5; length of nasals, 12.5; 

 length of upper molar series, 4.2. 



225. talamancfE (Oryzomys) , Allen, Proc. U. S. Nat. Mus., xiv, 1891, 



P- 193- 

 TALAMANCA RICE RAT. 



Type locality. Talamanca, Costa Rica. 



