HETEROMYS, 369 
horizontal, flat; tail long, exceeding body and head; soles hairy, 
with five tubercles; pouches covered with hair; tail scaly, short hairs 
from between the scales. 
A. *Heteromys. 
KEY TO THE SPECIES AND SUBSPECIES OF THE SUBGENUS. 
A. Pelage harsh; flattened spines present. 
a. Soles hairy, 5-tuberculate. PAGE 
a.’ Above mixed grayish yellow and black..../. irroratus 369 
b.’ Above grizzled smoke gray and yellow...... H. bulleri 369 
b. Soles hairy, 6-tuberculate. 
a.’ Above grizzled black and yellowish........ H. salvinit 370 
by, Above dark smoke brown.........5., H. s. nigrescens 370 
G Above dark smoke ordi... .\.. ¢s gues) H. gaumeri 371 
a Above blackighthrowii.. «........ndieses H, annectens 372 
® Above reddismimrowi.......cayeeeo | H. hispidus 371 
c. Soles naked, 6-tuberculate. 
a, Above chestnutibrown..:....0.9.6- H, desmarestianus 372 
Db. ‘Above blackishiarown:.... .cumetesle. . H. longicaudatus 372 
c.’ Above mixed dusky, brown, and ochra- 
SSIS. Memes akg AS pele kn Sem s Nigamve iowa of gle H. repens +372 
CT OVOCUSY BEAV wait ncaks . MERWE Oo H. goldmani 373 
e. Above prizzledwonth tulvous.....05..... H. g. lepturus 373 
f.’ Above drab grizzled: with Dlack............ H. griseus 373 
g.’ Above black, mixed with ochre yellow...H. adspersus 373 
375. irroratus (Hceteromys), Gray, Proc. Zool. Soc., 1868, p. 205. 
LA Parapa Spiny Rat. 
Type locality. La Parada, State of Oaxaca, Mexico. 
Geogr. Distr. State of Oaxaca, Mexico. 
Genl. Char. Tail short, hairy; lateral line present. 
Color. Upper parts grayish yellow, mixed with black; lips and 
under parts, inner side of legs, and feet white; faint lateral line pale 
fawn; tail beneath white. 
Measurements. Head and body, 118; tail, imperfect ? 106; 
hind foot and claws, 32.5. (ex mounted specimen in Brit. Mus. O. 
Thomas in litt.) 
376. bulleri (Heteromys), Thomas, Ann. Mag. Nat. Hist., 6th Ser., 
Ki, Te04; 074930. 
*The arrangement of the members of HerrEromys under its two subgenera 
Heteromys and Liomys cannot be satisfactorily accomplished, as the teeth of 
the adults in various instanees have no distinguishing characters; hence the 
present separation of the species and races in the keys given may be regarded 
only as tentative. 
