RHITHRODONTOMYS. 269 
a.—aureus (Reithrodontomys!), Merr., Proc. Wash. Acad. Scien., 
Ml; oor; p. 546: 
CaLEL Harvest Mouse. 
Type locality. Calel, Guatemala. Altitude, 10,200 feet. 
Genl. Char. Similar to KR. 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 vertebra, 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 (Keithrodontomys!), Merr., Proc. Wash. Acad. Scien., 
II, r9gor, p. 548. 
Topos Santos Harvest Mouse. 
Type locality. Todos Santos, Guatemala. Altitude, 10,000 feet. 
Genl. Char. Small; ears and tail long; miniature of R. tenuwir- 
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 vertebre, 113; hind foot, 
21. Skull: basal length, 17; zygomatic breadth, 11.5; palatal length, 
10; length of molar series, 3. (ex Type.) 
a.—albilabris (Reithrodontomys!), Merr., Proc. Wash. Acad. Scien., 
TM, WOOW, sar. SAG. 
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 vertebre, 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 (Keithrodontomys!), Merr., Proc. Wash. Acad. Scien., 
It, 1O@e, Pp. 553; 
