238 ORYZOMYS. 



Measurements. Total length, 255; tail vertebrae, 141; hind 

 foot, 29.5. 



217. chapman! (Oryzomys}, Thomas, Ann. Mag. Nat. Hist., 7th 



|5<r<,i, .898, p. 179- 

 CHAPMAN'S RICE RAT. 



Type locality. Jalapa, State of Vera Cruz, Mexico. 



Geogr. Distr. State of Vera Cruz, Mexico. 



Genl. Char. Size small. Skull small; nasals narrow posteriorly; 

 palatal foramina reaching nearly to anterior margin of the first upper 

 molar. 



Color. Upper parts dark fulvous and black, blacker on back; 

 beneath whitish, strongly suffused with slate; ears shining black; 

 wrists and ankles suffused with smoky brown; tail bicolor, blackish 

 above, paler below. 



Measurements. Total length, 121; tail vertebrae, 116; hind foot, 

 24; ear, 19. Skull: basal length, 21.6; basilar length, 19.8; greatest 

 breadth, 13.8; interorbital constriction, 4.3; length of nasals, 10.4; 

 breadth across squamosals, 11.4; palatal length, 11.5; length of 

 upper molar series, 3.7. 



a. eaudatus (Oryzomys), Merr., Proc. Wash. Acad. Scien., in, 



1901, p. 289. 

 LONG-TAILED RICE RAT. 



Type locality. Comaltepec, State of Oaxaca, Mexico. 



Genl. Char. "Similar to 0. chapmani, but larger, tail much 

 longer; color slightly darker. Skull larger and heavier, with longer 

 rostrum and broader nasals." (Merr., 1. c.) 



Color. Above dark fulvous and black, darkest on dorsal region; 

 sides paler; under parts grayish white; tail above blackish brown, 

 beneath paler, becoming grayish towards base; hands and feet flesh 

 color; ears black. 



Measurements. Total length, 257; tail vertebrae, 141; hind 

 foot, 30. 



b. dilutior (Oryzomys), Merr., Proc. Wash. Acad. Scien., in, 



1901, p. 290. 

 PALE RICE RAT. 



Type locality. Huauchinango, State of Puebla, Mexico. 



Genl. Char. "Similar to O. chapmani, but slightly paler; hind 

 foot longer. Rostrum and nasals broader; rostrum more swollen at 

 base; anterior root of zygoma heavier." 



Color. Above rufous and black, darkest on dorsal line; sides 

 inclining to yellowish brown; under parts white, tinged with buff; 



