14 MONOGRAPHS OF NORTH AMERICAN RODENTIA. 
long black-tailed, partly dusky-footed, style of Hesperomys witnessed in such 
a species as Nyctemys sumichrasti ; thirdly, the still more peculiar JV. cinerea 
of British America and various western Territories—an animal that, although 
a true Neotoma, shows us the densely hairy, almost bushy tail of AZyorus—a 
condition, in fact, that would almost equal a squirrel’s, were the tail perfectly 
distichous instead of rather terete. It has, indeed, been made the type of a 
different genus, Teonoma, but this, like many of Dr. J. E. Gray’s genera, need 
not be adopted. We tabulate the three species, together with the Guate- 
malan one. 
Analysis of species of NEOTOMA. 
1. Tarn sCANT-HAIRED (nearly as in Mus), bicolor, grayish and 
whitish, in length at most barely equaling the body without 
the head. Feet entirely white. Adults with the general 
body-colors of the Norway rat, but more fulvous on the 
sides ; white below; young, gray or slate. Upward of 9 
inches long; tail upward of 6; hind foot upward of 1.50. 
wikulltaveraging*2“inches't!2% . Veen 2 ee ee FLORIDANA. 
2. TAIL SCANT-HAIRED, as before, unicolor, blackish, nearly as long 
as head and body (up to 84 inches). Feet partly dusky. 
General body-colors as before, if anything darker. Aver- 
aging Targer than ‘the last?) 25 0. au Se ee FUSCIPES. 
3. TAIL SCANT-HAIRED, as before, unicolor, blackish, nearly as 
long as head and body. Feet partly dusky. General body- 
colors of adults rich warm rusty-red, hardly darker on the 
back ; under parts snowy, with distinct line of demarkation. 
Small; upward of 7 inches; tail nearly as much; hind 
foot under t50= skullabour dg oue sae) see eee eran ‘FERRUGINEA. 
4. Tatu DENSELY watry (as in Myorus), bicolor, brown or gray, 
and white. Size of floridana, or even larger; body-colors 
of floridana, but varying between dark plumbeous and pale 
Juteous, ) 28. ite ul aig eae ee CINEREA. 
NEOTOMA FLORIDANA, Say & Ord. 
Wood Rat. 
Mus floridanus, ORD, Bull. Soc. Philom, Phila. 1818, 181—Drsmarest, Mamm. ii, 1822, 307.—Say, Long’s 
Exped. R. Mts. i, 1823, 54, 
Arvicola floridanus, HaRLan, Fn. Amer. 1825, 141; Med. and Phys. Res. 1835, 53, pl. x, f. 1, 2, 3, 4. 
