ORYZOMYS. ; 235 
b.’ Above grayish brown heavily lined with PAGE 
follife) See oat, Sar nee. te ee a O. m. peragrus 243 
eee OW Ge CUZ BSC TUTOUME. 7. lim nee dee ose o is O. melanotis 243 
d.’ Above ochraceous fulvous, lined with 
(LITLE FEN Gs eee aia Se Reka ay gs nar ee O. rostratus 243 
e. Above deep fulvous and black.......... O. r. megadon 243 
iy ve llove gq: talib) ec) 0) 5 t= hen enema a en ne O. victus 244 
PND OW CUSED IDMOW I divs aa! tans vciiwek vd ebs O. devius 244 - 
e. Under parts buff. 
Seem LIU Ys UUUVIOUNG ste c: tidir sph s/30c10 ave waren ys O. crimius 245 
Pee DO We: ba Wily MUROUS Hora se guag wat a nds dae au O. tectus 245 
c.’ Above mixed fulvous and black. 
ELON AMD Mecale oa cc Sapte wh leans utp’ O. angusticeps 245 
lok ARS RASA neti 20h ala A Re en O. goldmani 246 
d.’ Above dark brown tinged with yellowish. 
rs UMICLON PALES MONON ty eine pbs wk acaus ee O. jalape 246 
Bee WmiGer WATE POTANe nbik ave ib isde ae 0 4 O. 7. apatelius 246 
e “Above dark fulvous and black.........4.. O. 7. rufinus 24% 
f. Under parts buffy fulvous. : 
Gh eX DOVE OTIZZICd DIStTE. Ss nas viokse seceeds O. teapensis 247 
g. Under parts deep buff. 
a.’ Above yellowish brown to yellowish 
RU MULer mea Tyvek Go NRE Ee aise o bic ees O. costaricensts 249 
b.’ Above bright yellowish red brown.......... O. vegetus 249 
h. Under parts yellowish; above rufous, sparsely lined with 
io Ls ued La eRe ack ee fe O. antillarum 247 
i. Under parts ochraceous fulvous; above grizzled yellowish 
MOlvOus limed with Dial. Ack ca cd els ca es O. richmondt 248 
j. Under parts yellowish fulvous; above yellowish fulvous 
Mins Hci neal 0) ie) atk eae ee ea O. fulvescens 248- 
209. nelsoni (Oryzomys), Merr., Proc. Biol. Soc. Wash., x11, 1898, 
De Us. 
Maria Mapre Isianp Rice Rat. 
Type locality. Maria Madre Island, Tres Marias Islands, State of 
Jalisco, Mexico. 
Geogr. Distr. Tres Marias Islands, State of Jalisco, Mexico. 
Genl. Char. Larger than O. mexicanus; tail very long, naked. 
Color. Above yellowish fulvous, lined with black on head and 
back; flanks and thighs buffy ochraceous; under parts white; tail 
dark brown, yellowish beneath at base. 
Measurements.* Total length, 342; tail vertebra, 190; hind 
foot, 38. 
