Baird's Wood-Rat 109 
b. Fulvous or rufous above. Size large; total length 14.0. 
N. floridana baileyi, p. iii 
c. Brownish with buffy yellowish wash, black-lined ; size medium ; 
total length about 13.0. N. fallax, p. 113 
d. Color pale fulvous, black-lined dorsal area; size small, total 
length 11.25. N. desertorum, p. 115 
B. Tail very large, bushy, somewhat distichous like that of a 
squirrel. (Subgenus Teonoma.) 
a. Larger, total length usually over 14.5; pelage washed with 
yellowish clay color, rather heavily black-lined above. 
N. cinerea orolestes, p. 1 1 6 
b. Smaller, length usually under 14.5, tail somewhat less bushy, 
a'. Color yellowish rufous above, lined with black. 
N. arizonae, p. 120 
b'. Color hghter, pale buffy ochraceous, dorsal region some- 
what Hned with black. N. cinnamomea, p. 120 
Neotoma micropus (Grk. mikros, small, + pons, foot, 
small-footed, rather a misnomer). Baird's 
Wood-Rat. 
Neotoma micropus Baird, Proc. Acad. Nat. Set. Phila., p. 333 
(1855). 
. Type locality. — Charco Escondido, State of TamauHpas, Mexico. 
Measurements. — Total length, 13.5; tail vert., 5.6; hind foot 1.6. 
Description. — (From a specimen taken at Monon, Baca County, 
Colorado, May 2d): Dark gray above, darkest on flanks, upper 
surface of tail the same, feet and under parts pure white. This 
is the only one of our species that is distinctly and clearly gray. 
Distribution. — Baird's Wood-rat has been reported from Mexico, 
Texas, New Mexico, Oklahoma, and Colorado. From Colorado the 
only records at present are my own; I took it at Monon and heard 
of it at Springfield, Baca County. 
Habits. — In Colorado this rat was found living among the 
sandstone rocks through which Bear Creek, in Baca County, 
has worn a channel. Here were many overhanging, shelving 
places, and cracks and crevices running back into the rock. 
About these places were found the messes of rubbish which 
it is the habit of all wood-rats, of whatever species, to collect 
about their nests and dens. These piles consist of anything 
portable which the rats may find anywhere about, sticks, 
