262 RHITHRODONTOMYS. 
Measurements. Average total length, 136.5; tail vertebra, 72; 
hind foot, 17; ear, 11.2. Skull: occipito-nasal length, 19.5; Hensel, 
14; zygomatic width, 8.5; interorbital constriction, 3; length of 
nasals, 7; palatal length, 7.3; length of upper tooth row, 3. 
a.—pallidus (Retthrodontomys!), Rhoads, Amer. Nat., 1893, p. 835. 
pallidus (Rhithrodontomys), Elliot, Syn. N. Am. Mamm., 1gor, 
Dp: t52.1d Suppl. p. 404: 
LoweER CALIFORNIA HARvEST MOUSE. 
Type locality. Santa Isabel, San Jacinto Mountains, San Diego 
County, California. 
Geogr. Distr. Southern California and northern Lower Cali- 
fornia, Mexico. 
Genl. Char. Larger than R. longicaudus and paler. 
Color. Above buffy gray, darker on dorsal line; face and lateral 
line ochraceous; under parts and feet white; spot between fore legs 
and on breast buff; tail bicolor. 
Measurements. Total length, 137; tail vertebre, 73; hind foot, 
16. Skull: occipito-nasal length, 19.5; Hensel, 14; zygomatic width, 
10; interorbital constriction, 3; breadth of braincase, 9.3; length of 
nasals, 7; palatal length, 7. 
252. saturatus (Keithrodontomys!), Allen & Chapman, Bull. Amer. 
Mus. Nat. Hist. 1897, p. 26: 
Las Vicas Harvest Mouse. 
Type locality. Las Vigas, State of Vera Cruz, Mexico. 
Geogr. Distr. State of Vera Cruz, Mexico; range unknown. 
Genl. Char. Similar to R. megalotis, but larger and darker. 
Color. Upper parts dark brown, lined with black on median 
line and tinged with grayish fulvous; sides grayish fulvous; under 
parts whitish plumbeous; tail dark brown above, gray below; hands 
and feet grayish white. 
Measurements. Total length, 148; tail vertebre, 74; hind foot, 
18. Skull: total length, 21; basal length, 17; zygomatic width, 11; 
width of braincase, 10; interorbital constriction, 2.5; length of 
nasals, 8; palatal length, 8; length of upper tooth row, 3.3. 
a.—ecinereus (Reithrodontomys!), Merr., Proc. Wash. Acad. Scien., 
LOOT, Pp. 550: 
CINEREOUS HARVEST MOUSE. 
Type locality. Chalchicomula, State of Puebla, Mexico. 
Genl. Char. ‘‘Similar to R. saturatus, but very much paler and 
grayer, particularly the head and shoulders; tail shorter and more 
sharply bicolor; skull similar, but slightly smaller; rostrum 
shorter.”’ 
