258 RHITHRODONTOMYS. 



PAGE 



b.' Small; total length, 165 mm R. m. gracilis 265 



c.' Smallest; total length, 152 mm R. tenuis 265 



f. Above golden yellow and black. 



a/ Beneath white, tinged with salmon ful- 

 vous R. chyrsopsis 265 



b/ Beneath whitish R. c. tolucce 266 



g. Above yellowish fulvous and black; beneath 



buffy salmon R. perotensis 266 



h. Above golden fulvous; beneath buffy salmon. 



a/ Tail, 105 mm R. orizabce 266 



b/ Tail, 90 mm R. colimce 266 



c/ Tail, no mm R. c. nerterus 267 



i. Above ferrugineous brown and black; be- 

 neath white, washed with yellow R. costaricensis 267 



j. Above pale ferrugineous brown and black; 



beneath white R. c. jalapce 267 



k. Above ochraceous fulvous; beneath white. . . .R. goldmani 268 

 1. Above rufous and black; beneath orange 



buff or orange gray R. rufescens 268 



m. Above fulvous, grading to ferrugineous; be- 

 neath salmon fulvous R. tenuirostris 268 



n. Above paler fulvous; beneath fulvous R. t. aureus 269 



o. Above reddish fulvous; beneath salmon 



fulvous .' R. microdon 269 



p. Above fulvous, beneath white R. m. albilabris 269 



q. Above yellowish fulvous and black; beneath 



white R. hirsutus 269 



r. Above buffy gray; beneath white R. griseiflavus 270 



s. Above orange fulvous and black; beneath 



white R. g. helvolus 270 



t. Above fulvous and black; chin, throat, and 



under parts pale fulvous R. levipes 270 



u. Above fulvous and black; chin, throat, and 



under parts pale fulvous, ear larger, tail 



longer R. I. otus 271 



v. Above yellowish brown and black; beneath 



whitish R. I. toltecus 271 



w. Above mixed black and tawny ochraceous 



R. inexpectatus 271 



x. Above grayish, washed with buffy and lined 



with black; beneath buffy white R. dorsalis 272 



y. Above bistre; beneath dark cinnamon R. creper 272 



