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. 
291a. *picta (Neotoma), Goldman, Proc. Biol. Soc. Wash., xvi, 
1904, p. 79. 
Patintep 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 vertebrae, 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., xvi, 
1904, Pp. 90) 
IstHMIAN Woop Rat. 
Type locality. 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 vertebre, 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. 
