58 ORYZOMYS. 



19.2; intertemporal width, 5.1; length of nasals, 11.3; palatal length, 



7.1; length of upper molar scries, 6.2; length of mandible, IQ. 

 length of lower molar series, 6.5. Ex type in United States National 

 Museum. 



Genus Oryzomys (66). 



Oryzomys alfaroi incertus Allen. 



Or\'~i>mys alfaroi inccrlii.s Allen. Bull. Am. Mus. Xat. Hist., XXIV. 

 1908, p. 655. 



Type locality. Rio Grande, Nicaragua. 



(/V;//. Char. Similar to O. alfaroi, but smaller and darker. 



Color. Head and entire upper] arts golden rufous, darkest on 

 dorsal region; outer side of limbs paler; underparts and inner side 

 of limbs whitish; hands white, feet pale brown; tail naked, above 

 blackish, beneath paler; cars blackish brown. Ex type in American 

 Museum of Natural History. 



Measurements. Total length, 190; tail, 101; hind foot, 19.7. 

 Skull: Broken; intertemporal width, 4.7; length of nasals, 10.2: 

 length of upper molar series, 5.2; length of mandible, 13.4; length <>t 

 lower molar- series, 4.6. Ex type in American Museum of Natural 

 History. 



Oryzomys bombycinus Goldman. 



Oryzomys bombycinus Goldman. Smith. Misc. Coll., LVI, 191 -', 

 No. 36, p. 6. 



Type locality. Cerro Azul, near headwaters, of Chagres River, 

 Panama. Altitude, 2500 feet. 



Genl. Char. Similar to 0. carrikeri, but fur longer, and the skull 

 more slender. 



Color. Face blackish; upperparts vandyke-brown ; dorsal line 

 black, flanks paler; underparts whitish; plumbeous color of under- 

 fur showing; hands and feet dark flesh color; tail above brownish, 

 beneath grayish. Ex type in United States National Museum. 



.\feasnrcmcnls. Total length, 252; tail, 127; hind foot, 3- 1 . 

 Skull: Occipito-nasal length, 31.1; Hensel, 23.7; zygomatic width, 

 i.v4; intertemporal width, 5.5; length of nasals, 12.2; palatal length, 

 6.2; length of upper molar series, 3.6; length of mandible, 14.1; length 

 of lower molar scries, 5. Ex type in United States National Museum. 



Oryzomys pirrensis Goldman. 



Oryzomys pirrensis Goldman, Smith. Misc. ("oil., LX. [913, No. - 1 - 1 , 



p. 5- 



