RHITHRODONTOMYS, 261 
Genl. Char. Similar to RK. megalotis, but darker; nasals equal in 
length to premaxille. 
Color. Above dull fulvous brown lined with black; sides buffy 
ochraceous; beneath plumbeous washed with buffy salmon; pectoral 
patch fulvous; tail dark brown above, gray beneath; hands and feet 
white; ears dark brown. 
Measurements. Total length, 156; tail vertebre, 87; hind 
fapt, =7.5. 
c.—obseurus (Reithrodontomys!), Merr., Proc. Wash. Acad. Scien., 
Mi TOOT, p< 558. 
Dusky Harvest Mouse. 
Type locality. Sierra Madre, near Guadaloupe y Calvo, State of 
Chihuahua, Mexico. 
Genl. Char. ‘‘Similar to R. megalotis, but everywhere much 
darker; upper parts conspicuously lined with and darkened by black 
hairs, under parts buffy salmon (instead of white), with pale fulvous 
pectoral patch; skull as in R. megalotis.”’ 
Color. Above mixed rufous and black, darkest on dorsal region; 
sides paler, a mixed gray and dark buff; under parts buff; no lateral 
line; hands and feet white; tail above dark brown, beneath whitish. 
Measurements. Total length, 167; tail vertebre, 90; hind 
foot, 19. 
251. longicaudus (Reithrodon!), Baird, N. Amer. Mamm., 1857, p. 451. 
longicaudus (Rhithrodontomys), Elliot, Syn. N. Am. Mamm., 1go1, 
p. 151. Jd. Suppl. p. 494. 
LoNnG-TAILED Harvest Mouse. 
Type locality. Petaluma, Sonoma County, California. 
Geogr. Distr. Lower California, Mexico, to California, west to 
the Sierra Nevada, from coast region of Monterey County, north to 
Mendocino County (Eureka, Humboldt County, see Elliot, Field 
Columb. Mus., 11, p. 186. Zodlogy), and in the interior from San 
Joaquin County, north to Tehama County. Probably further south 
irregularly in the coast and San Bernardino ranges of mountains. 
(Allen. ) 
Genl. Char. Small; colors darkish; tail long, more than half the 
length of head and body. 
Color. Above yellowish brown and black, darkest on dorsal line; 
sides more yellowish, and with a fulvous lateral line from cheeks to 
rump; beneath grayish white, tinged often with yellow, and fre- 
quently with a fulvous spot on the breast; ears dusky, rusty brown 
tuft at the anterior base; feet whitish; tail dusky above, grayish 
white below. 
