PEROGNATHUS, 353 
FiG. 67. PEROGNATHUS MERRIAMI. 
No, 4963 Field Columbian Mus, Coll. ‘Twice nat, siz 
UprER TOOTH ROW, LOWER TOOTH ROW 
Enlarged to times, Enlarged to times 
A. Perognathus. 
Mastoids well developed, extending beyond occipital line; inter- 
parietal pentagonal; mastoid side of parietal longest; audital bulle 
nearly contiguous below basisphenoid. 
KEY TO THE SPECIES AND SUBSPECIES OF THE SUBGENUS, 
A. Size small; hind foot less than 18 mm. 
a. Tail about 60 mm. PAGE 
a.’ Above ochraceous and black..... _P, merriamt 353 
b.’ Above pale fulvous or buff and black, 
a.’ Wind toot, 75 mm. Sarg! tinge’. TQVUS 354 
Oe) Ce TOO, D7 AN ees occ een ares P.f. mexicanus 355 
¢,’ Hind foot, 17.4 mm. Ph is P. p. brevinasus 355 
c.’ Above pale ochraceous drab and black P, pacificus 355 
B. Size large; hind foot over 18 mm.,... ., P. a, melanois 3506 
359. merriami (Perognathus), Allen, Bull. Am. Mus. Nat. Hist., 
1892, p. 45, pl. m1, figs. 1-6. Elliot, Syn. N. Am. Mamm., 
TOOl, Dim 243. 
mearnst Allen, Bull. Am. Mus. Nat. Hist., 1896, p. 237 
