ORYZOMYS. 245 
232. crinitus (Oryzomys), Merr., Proc. Wash. Acad. Nat. Scien., 111, 
THOR p. 281. 
LONG-HAIRED Rice Rat. 
Type locality. Tlalpam, Federal District, Mexico. 
Genl. Char. Large; hind feet long; ears short. Skull resembling 
that of O. c. aztecus Merr. 
Color. Above buffy fulvous, darkest on rump, and lined with 
black; chin, throat, and forelegs whitish; rest of under parts buffy; 
tail dusky above, yellowish below. 
Measurements. Total length, 307; tail vertebrz, 161; hind foot, 37. 
a.—aztecus (Oryzomys), Merr., Proc. Wash. Acad. Scien., 111, 1gor, 
202. 
Aztec Rice Rat. 
Type locality. Yautepec, State of Morelos, Mexico. 
Geogr. Distr. Southeastern Mexico, from States of Morelos and 
Puebla to Isthmus of Tehuantepec. 
Genl. Char. Skull: nasals and zygomata slender, the latter bowed 
downward; palatal slits broadly open posteriorly. Under parts white. 
Color. Above ochraceous, sparsely lined with black; under parts 
white; tail brownish above, paler beneath. 
Measurements. Total length, 290; tail vertebra, 154; hind foot, 35. 
233. tectus (Oryzomys), Thomas, Ann. Mag. Nat. Hist., viir, rgor, 
po. Aer. 
Bocava Rice Rat. 
Type locality. Bogava, Chiriqui, Panama. Altitude, 800 feet. 
Genl. Char. Size large; tail longer than head and body. Skull 
has the supraorbital ridges overhanging and expanded; frontal region 
concave; muzzle heavy; palatal foramina not reaching level of molars. 
Color. Above tawny rufous, slightly lined with black; sides 
inclining to ochraceous; upper lip fulvous; chin white; under parts 
buffy; hands and feet pale buff; tail brown above, white below; ears 
with ochraceous tuft at base. 
Measurements. Total length, 282; tail, 142; hind foot, 29.5; ear, 
18. Skull: tip of nasals to back of interparietal, 33; greatest breadth, 
17; interorbital constriction, 6.5; length of nasals, 11.6; palatal length, 
13.8; length of upper molar series, 4.9. 
234. angusticeps (Oryzomys), Merr., Proc. Wash. Acad. Scien., 11, 
TOOE,Jp:. 292. 
SANTA Maria VoLcaANo RICE Rat. 
Type locality. Volcan Santa Maria, Guatemala. Altitude, 9,000 feet. 
Geogr. Distr. Guatemala, Central America. 
