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 SUHGENUS. 

 A. Pelage harsh; flattened spines present. 



a. Soles hairy, 5-tuberculate. PAGE 

 a/ Above mixed grayish yellow and black. . . .H. irroratus 369 

 b.' Above grizzled smoke gray and yellow H. bullcri 369 



b. Soles hairy, 6-tuberculate. 



a.' Above grizzled black and yellowish H. salvini 370 



b.' Above dark smoke brown H. s. nigrcsccns 370 



c.' Above dark smoke gray H. gaumcri 371 



d/ Above blackish brown H. auncctcns 372 



e/ Above reddish brown H. hispidus 371 



c. Soles naked, 6-tuberculate. 



a/ Above chestnut brown H. dcsmarestianns 372 



b.' Above blackish brown H. longicaiidatus 372 



c/ Above mixed dusky, brown, and ochra- 



ceous H . rcpens 372 



d/ Above dusky gray H. goldmani 373 



e/ Above grizzled with fulvous H. g. Icpturus 373 



f/ Above drab grizzled with black H. griseus 373 



g/ Above black, mixed with ochre yellow. . .H. adspersus 373 



375. irroratus (llctcromys), Gray, Proc. Zool. Soc., 1868, p. 205. 

 LA PARADA 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 (Hetcromys), Thomas, Ann. Mag. Nat. Hist., 6th Ser., 

 xi, 1893, p. 330. 



*The arrangement of the members of HETEROMYS under its two subgenera 

 Heteromys and Liomys cannot be satisfactorily accomplished, as the teeth of 

 the adults in various instances have no distinguishing characters; hence the 

 present separation of the species and races in the keys given may be regarded 

 only as tentative 



