RHITHRODONTOMYS. 269 
a.—aureus (Retthrodontomys!), Merr., Proc. Wash. Acad. Scien., 
III, 1901, p. 548. 
CaLEL Harvest MOovseE. 
Type locality. Calel, Guatemala. Altitude, 10,200 feet. 
Genl. Char. Similar to R. tenturostris, but paler; nasals narrow 
and exceeding premaxille in length; incisive foramina passing plane 
of first molars. 
Color. Above yellowish brown, lined with black, with a reddish 
tinge on rump; under parts salmon fulvous; tail dark brown; hands 
and feet dark brown, becoming white towards toes; ears blackish. 
Measurements. Total length, 196; tail vertebrae, 112; hind foot, 
22.5; Skull: basal length, 20; zygomatic breadth, 13; palatal length, 
11.5; length of molar series, 4.5. (ex Type.) 
265. microdon (Reithrodontomys!), Merr., Proc. Wash. Acad. Scien., 
fil, -SOOL, Pp. 548: 
Topos Santos Harvest Mouse. 
Type locality. Todos Santos, Guatemala. Altitude, 10,000 feet. 
Genl. Char. Small; ears and tail long; miniature of R. tenwir- 
ostris. 
Color. Above reddish fulvous, deepest on rump; sides bright 
fulvous; beneath salmon fulvous; orbital ring dark, tail dusky; 
hands white; ankles and feet dark brown; toes white; ears dark 
brown. 
Measurements. Total length, 185; tail vertebra, 113; hind foot, 
21. Skull: basal length, 17; zygomatic breadth, 11.5; palatal length, 
10; length of molar series, 3. (ex Type.) 
a.—albilabris (Retthrodontomys!), Merr., Proc. Wash. Acad. Scien., 
III, I9OI, p. 549. 
WHITE-LIPPED Harvest Mouse. 
Type locality. Cerro San Felipe, State of Oaxaca, Mexico. Alti- 
tude, 10,000 feet. 
Genl. Char. Similar to R. microdon, but paler; skull with certain 
comparative variations. 
Color. Above fulvous, darkest on dorsal region; lips, nose, and 
under parts pure white; tail dark brown, paler beneath; wrists dusky; 
feet and ankles blackish brown; ears brown. 
Measurements. Total length, 187; tail vertebra, 117; hind foot, 
20. Skull: basal length, 17; zygomatic breadth posteriorly, 11.5; 
length of palate, 10; length of molar series, 3. (ex Type.) 
266. hirsutus (Reithrodontomys!), Merr., Proc. Wash. Acad. Scien., 
I TOOL, ps-553. 
