RICE RATS 291 



skull narrower, with narrower parallel zygomata, smaller bulla, and 

 widely different incisive foramina, as above described. 



Measurements. — Type specimen ( $ ad.) : total length 209 mm. ; 

 tail vertebrag 106; hind foot 25. 



ORYZOMYS HYLOCETES sp. nov. 



Type from Chicharras, Chiapas, Mexico. No. 77605 $ old. U. 

 S. National Museum, Biological Survey Coll. Feb. 14, 1896. E. W. 

 Nelson and E. A. Goldman. Original number 9306. 



Characters, — Size small ; ears large ; color dark with ruddy suf- 

 fusion. Similar to palathius from Teapa but skull different. 



Color. — Upperparts very dark rufous brown; underparts soiled 

 whitish, the dark slate basal fur showing through; hind feet dark; 

 ears and tail blackish. 



Cranial characters. — Skull small, light, and narrow, with spread- 

 ing zygomata, and flat nasals which are shortly truncate anteriorly. 

 Similar in size and general characters to chapmatzi and palatinus^ 

 with braincase narrow as in palatinus, but zygomata more spreading 

 than either, and nasals peculiar, being rather flat and shortly and 

 squarely truncate anteriorly. 



Measurements. — Type specimen ( $ ad.) : total length 217 mm. ; 

 tail vertebrae iiS; hind foot 27. 



ORYZOMYS RHABDOPS sp. nov. 



Type from Calel, Guatemala (alt. loooo ft.). No. 76813 $ ad. U. 

 S. National Museum, Biological Survey Coll. Jan. 15, 1S96. E. 

 Nelson and E. A. Goldman. Original number 9135. 



Characters. — Size medium ; ears thin, rather large ; nose and 

 streak from nose to eye black ; pelage long and woolly; color dark 

 grizzled fulvous ; underparts soiled white. Skull with broadly spread- 

 ing squarish zygomata and short incisive foramina. 



Color. — Upperparts fulvous, on head and back grizzled and ob- 

 scured by black hairs, on sides purer and reaching forward to cheeks ; 

 underparts soiled whitish ; nose and streak from nose to eye blackish ; 

 sides of nose below black streak pale fulvous ; ears blackish ; tail 

 dusky brown above, yellowish below. The young are darker and re- 

 semble angusticeps. 



Cranial characters. — Braincase large and rounded ; rostrum long 

 and slender; zygomata very broadly and squarely spreading, their 

 anterior roots in adults reaching far ourward, their outer sides parallel 

 or even slightly broadest anteriorly (in this respect unlike any other 

 known species) ; incisive foramina short and rather broad. 



