374 HETEROMYS., 
Genl. Char. Soles 6-tuberculate; tail half as long as head and 
body. 
Color. Head dark gray; upper parts black, mixed with ochre 
, yellow, base of all the hairs white; flat grooved spines, with black 
tips; the stiff hairs with a black ring and reddish yellow tip, these 
last distributed sparingly over the head and rump; tip of nose, lips, 
inner sides of arms and legs and under parts of body white; tail 
above black, beneath white; ears naked on outer side, black on inner. 
Measurements. Total length, 240; tail, 95; hind foot and claw, 30. 
B. Liomys. 
I. P.—; M23 = 20. 
I— I—I 3-3 
Pelage harsh; tail well haired; molars with two parallel trans- 
verse loops, without “‘ additional lobes or permanent enamel islands,”’ 
uniting in old animals and forming a horseshoe as in Heteromys. 
Fig. 70. HETEROMYS (LIOMYS) ALBOLIMBATUS. 
No. 8673 Field Columbian Mus. Coll. Nat. size. 
LOWER TOOTH ROW. UPPER TOOTH ROW. 
Enlarged 6 times. Enlarged 6 times. 
KEY TO THE SPECIES AND SUBSPECIES OF THE SUBGENUS. 
A. Soles 5-tuberculate. PAGE 
a. Above mixed black and yellowish black. .H. albolimbatus 375 
b. Above mixed gray and pale fulvous........... H. canus 375 
c. Above blackish-and buff ¥gegee. .. 2. eee Oo H. allent 376 
d. Above grizzled gray. 
a.’ Dark ‘‘saddle’’ on middle of back......... H. torridus 376 
b.’ No. “saddle%,on @iddle of Bback.......... H.t. minor 377 
e. Above mixed buff and brownish black........ H. exiguus 377 
Above grizzled fulvous and black...... H. plantinarensis 377 
