286 MERRIAM 



Remarks. — Externally this species resembles viexicamis as closely 

 (perhaps more closely) than it does Jalapce, and its relationship to 

 mexicanus appears to be close. But the skull differs from that of 

 mexicanus in the curious form of the zygomata, which are strongly 

 bowed outward and downward ; in the narrower nasals, narrower 

 rostrum, smaller braincase, and slightly smaller molars. In the form 

 of the zygomata and some other respects it suggests aztectis. 



Measurements. — Type specimen ( $ ad.) : total length 390 mm. ; 

 tail 152; hind foot 33. 



ORYZOMYS TEAPENSIS sp. nov. 



Type from Teapa, Tabasco, Mexico. No. 99973 $ yg.-ad. U. S. 

 National Museum, Biological Surv^ey Coll. April 4, 1900. E. W. 

 Nelson and E. A. Goldman. Original number 14100. 



Characters. — Similar in general to O. jalapcB but ears decidedly 

 smaller; hind feet (and tail.^) shorter; pelage shorter and coarser; 

 color much darker; rostrum much smaller. 



Color. — Upperparts very dark grizzled bister, becoming yellowish 

 on sides, and profusely mixed with black hairs; underparts, except 

 chin, throat and forelegs, suffused with buffy fulvous ; tail dusky, be- 

 coming yellowish at base below. 



Cranial characters. — Skull small, with poorly developed super- 

 ciliary beads, and small deciirved rostrum; incisive foramina broadly 

 open behind premaxillary sutures. It differs markedly ixovs\ jalapce 

 in the small rostrum and broadly open (posteriorly) incisive foramina. 



jMeasure?nents. — Type specimen ( $ yg.-ad.) : total length 259 

 mm.; tail 129; hind foot 32.5. 



ORYZOMYS BULLERI Allen. 



Oryzomys bullcri Allen, Bull. Am. Mus. Nat. Hist., ix, 53-54, March 15, 

 1897. 



Type from Valle de Banderas, Jalisco, Mexico. 



Characters. — Size medium or rather small ; ears rather small ; color 

 buffy fulvous. 



Color. — Upperparts buffy fulvous, deepest on rump, palest 

 anteriorly, lined on back with black hairs ; underparts white ; nose 

 dusky; tail brownish above, yellowish below. 



Cranial characters. — Skull similar to that of jalapce but slightly 

 smaller, with smaller rostrum, more acute nasals, vanishing super- 

 ciliary beads, and slightly longer molar series. 



