RHITHRODONTOMYS, 267 
Genl. Char. Size small; ears large; tail short; nasals equal to 
premaxille. 
Color. Above buffy fulvous to golden fulvous, lined with black; 
beneath buffy salmon; tail dusky above, whitish below; hands whitish, 
feet brownish, whitish towards toes; wrists and ankles dark, nearly 
black; ears blackish. 
Measurements. Total length, 165; tail vertebre, 90; hind foot, 20. 
a.—nerterus (Retthrodontomys!), Merr., Proc. Wash. Acad. Scien., 
i, IQOL, Pp. 551: 
Cotima Harvest Mouse. 
Type locality. Sierra Nevada de Colima, State of Jalisco, Mexico. 
Altitude, 6,500 feet. 
Genl. Char. Similar to R. colime; tail longer, skull and molars 
smaller. 
Color. Above golden fulvous, lined with black, darkest on dorsal 
line; side golden fulvous; under parts salmon buff; hands and feet 
brown; tail above blackish brown, paler beneath; ears dark brown. 
Measurements. Total length, 190; tail vertebre, 110; hind 
foot, 20. 
261. costaricensis (Retthrodontomys!), Allen, Bull. Am. Mus. Nat. 
Hist. 1895, p. 139. 
Costa Rica Harvest Mouse. 
Type locality. La Carpintera, Costa Rica. Altitude, 6,000 feet. 
Geogr. Distr. Costa Rica, Central America. 
Genl. Char. Size large; similar in color to Peromyscus cherrit. 
Color. Upper parts ferrugineous brown, lined with black; sides 
orange rufous; under parts white, washed with yellow; fulvous patch 
sometimes on breast; tail nearly naked, dusky brown, unicolor; 
hands and feet whitish, with a median dusky stripe on feet; ears 
brown. 
Measurements. Total length, 197; tail vertebrae, 111; hind foot, 
20.5; ear, 12. Skull: occipito-nasal length, 22.5; Hensel, 17; zygo- 
matic width, 12; interorbital constriction, 3.5; length of nasals, 8; 
palatal length to incisive foramina, 4; length of upper molar series, 3. 
a.—jalape (Retthrodontomys!), Merr., Proc. Wash. Acad. Scien., 
Hi, E9OL, :p. 532- 
JaLapA Harvest Mouse. 
Type locality. Jalapa, State of Vera Cruz, Mexico. Altitude, 
4,000 feet. 
Genl. Char. Similar to R. costaricensis, but paler; nasals truncate 
posteriorly. 
