264 RHITHRODONTOMYS, 
Genl. Char, ‘Skull similar in general to that of R. saturatus, but 
incisive foramina more broadly open; molar series slightly shorter.”’ 
Color. Above fulvous and black, beneath pale fulvous; chin, 
throat, hands, and feet whitish; tail above dusky, beneath whitish. 
Measurements. Total length, 177; tail vertebre, 100; hind 
foot, 19.5. 
255. mexicanus (/eithrodoii!), Sauss., Rev. Mag. Zoél., 2me Sér., x11, 
F606, 'D. TOO, ply Ix, et, 
sumichrastt, Sauss., Rev. Mag. Zodl., 2me Sér., 1861, p. 3. 
Mexican Harvest Mouse. 
Type locality. Mountains in State of Vera Cruz, Mexico. 
Geogr. Distr. State of Vera Cruz, Mexico. 
Genl, Char. Size large; tail longer than head and body; feet large. 
Color. Above rufous brown; sides orange brown; under parts 
white, tinged with buff on throat and breast; ears brown; tail 
blackish, almost naked; hands white; feet dusky. 
Measurements. Total length, 153-169; tail vertebra, 80-100; 
hind foot, 18-20; ear, 15-17. 
a.—intermedius (Reithrodontomys!), Allen, Bull. Amer. Mus. Nat. 
Hist: 71698, py 136. 
intermedius (Rhithrodontomys), Elliot, Syn. N. Am. Mamm., rgor, 
p. 153. /d. Suppl. p. 494. 
BROWNSVILLE Harvest MOusE. 
Type locality. Brownsville, Cameron County, Texas. 
Geogr. Distr. Northern Mexico, into Texas. 
Genl, Char. Smaller than Rk. mexicanus and paler. 
Color. Above grayish brown, washed with pale yellowish, mixed — 
with dark hairs on middle of back, sides lighter; lateral line yellowish, 
beneath white; ears brown; apical third of inner side rufous; feet 
whitish; tail dusky, nearly unicolor. 
Measurements. Total length, 194; tail vertebra, 1o8; hind foot, 
21; ear, 13. 
b.—fulvescens (Retthrodontomys!), Allen, Bull. Amer. Mus. Nat. 
Hist., 1894, p. 319. 
OposurA Harvest Mouse. 
Type locality. Oposura, State of Sonora, Mexico. 
Geogr. Distr. State of Sonora, Mexico; range unknown. 
Genl. Char. Similar to Rk. mexicanus, more yellowish. 
Color. Above yellowish brown, lined with black; lateral line 
fulvous; under parts whitish; tail above pale brown, beneath lighter; 
hands and feet whitish. 
