ORYZOMYS. 235 
b.’ Above grayish brown heavily lined with PAGE 
iP LE OA ee i ee te eee ee O.m. peragrus 243 
ee OWE STIAZICO TULOUS 2. <n chase ees O. melanotis 243 
d.’ Above ochraceous fulvous, lined with 
tet ete es Fae EE ae aio eG iw de O. rostratus 243 
e.’ Above deep fulvous and black.......... O. r. megadon 243 
Mee DOVE GATE THOUS. 6.64 sos sg biele scene es O. victus 244 
Bey OUM.E TUSSEL LOWE: 6. ey bf ewe tw sos we O. devius 244 
e. Under parts buff. ; 
eevee: DEY TUIVOUS.. 2264.5 06 go daa. ds O. crinitus 245 
PeeeriioNe tawiy TUlOUS:. 22 cole 25 eos se aes ss O. tectus 245 
c.’ Above mixed fulvous and black. 
MeO EMEC SS oc toa ee Ee a isle doer R nls O. angusticeps 245 
Pee SIRANEL 7 \.5/ 2 con kiaa fle We eis on cermin ts O. goldmant 246 
d.’ Above dark brown tinged with yellowish. 
aeeemeer parts, DWE. vo. 6ci «actions Sue 2 O. jalape 246 
Ree Cinder Parts Pray. oe idee ole ee aes O. 4. apatelius 246 
e.’ Above dark fulvous and black............ O. 7. rufinus 247 
f. Under parts buffy fulvous. 
meempove gtizzied bistre:.. .. 6. ees. eee en O. teapensis 247 
g. Under parts deep buff. 
a.’ Above yellowish brown to _ yellowish 
SES eae TO eee ee ae O. costaricensis 249 
b.’ Above bright yellowish red brown.......... O. vegetus 249 
h. Under parts yellowish; above rufous, sparsely lined with 
RENE rec te cian lias oth MA are oe 6 rs O. antillarum 247 
i. Under parts ochraceous fulvous; above grizzled yellowish 
mbvous immed with black. : $222.5 tc. 6d O. richmondt 248 
j. Under parts yellowish fulvous; above yellowish fulvous 
MnMRIONVRE LL ACH no 2 LS ae hola ae eae O. fulvescens 248 
209. nelsoni (Oryzomys), Merr., Proc. Biol. Soc. Wash., x11, 1898, 
ES. 
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 vertebre, 190; hind 
foot, 38. 
