NEOTOMA. 287 
on chin, center of breast, and a line down through the center of the 
abdomen to anal region, which have the hairs white to the roots; tail 
dusky above, whitish beneath; ears pale brown. 
Measurements. Total length, 335; tail vertebre, 158; hind foot, 
34; ear, 34. Skull: occipito-nasal length, 41; Hensel, 34; zygomatic 
breadth, 21; interorbital constriction, 5; width of braincase at root 
of zygomata, 18; posterior width, 14; palatal arch to alveoli of 
incisors, 19; postpalatal length, 15; median length of nasals, 15; 
posterior width of nasals, 2.5; anterior width of nasals, 4.5; palatal 
arch to hamular processes of pterygoids, 7; width of basioccipital 
anteriorly, 8; length of upper molar series, 7; length of mandible, 
angle to alveolus of incisor, 23; height at condyle, 11; at coronoid 
process, 12.5; length of lower molar series, 8. 
29la. *picta (Neotoma), Goldman, Proc. Biol. Soc. Wash., xvu, 
1904, p. 79. 
PaintTED Woop Rat. 
Type locality. Chilpancingo, State of Guerrero, Mexico. 
Genl. Char. Size medium; tail long, slender. 
Color. Upper parts orange rufous, sprinkled with black on head 
and back; beneath white, plumbeous under fur showing; axille 
orange rufous; tail above dusky, beneath paler; hands yellowish 
white; feet dusky; toes white; ears dusky. 
Measurements. Total length, 368; tail vertebre, 180; hind foot, 
37. Skull: greatest length, 43.3; Hensel, 35; zygomatic width, 23; 
interorbital constriction, 5; length of nasals, 17.4; palatal length, 
8.6; length of upper molar series, alveolar border, 8.7. 
291b. isthmica (Neotoma), Goldman, Proc. Biol. Soc. Wash., xvu, 
LOOA,, Pp. O0: 
IstHMIAN Woop Rat. 
Type locahity. Tehuantepec, State of Oaxaca, Mexico. 
Genl. Char. Size large; tail long, stout; ears medium. 
Color. Above between orange rufous and ferrugineous; outer side 
of forearms and hind legs grayish fulvous; top of head and back 
sprinkled with black; under parts and inner sides of arms and legs 
soiled white; tail above brownish, beneath paler; hands white; feet 
dusky; toes white. 
Measurements. Total length, 395; tail vertebrae, 198; hind foot, 
38. Skull: greatest length, 48.4; Hensel, 38.4; zygomatic breadth, 
23.7; interorbital constriction, 6.2; length of nasals, 19; palatal length, 
8.3; upper molar series, alveolar border, 9. 
*Descriptions of the four following Wood Rats were published too late to 
be included in the regular numerical order. 
