DIPODOMYS. 345 
hairy; hind foot with four toes only; cheek pouches large; fur of 
velvet softness. All the species of both genera have facial crescentic 
lines more or less distinctly marked; side of mouth white; white 
spot over the eyes and another behind the ear, and a white stripe 
across the thighs, usually reaching the tail; digits four. 
Gena wOnee SPECIES: 
A. Hind foot with four toes. 
a. Under parts white. 
PAGE 
Spee DOVE GDia MEMNMREU Ee os. 6... >... Cen D. phillipst 343 
by eAbove soldepiei@nseclon:.............,50 D. ornatus 344 
c.’ Above mixed brownish clay color and 
MCle. \ tO OEE eS. ee D. perotensis 344 
d.’ Above yellowish brown and black......... D. mitchelli 344 
@ Above pale yellowish brown.........9.4..).". D. deserti 345 
ieee bove ochraceous) put and black. .../:.kus D. spectabilis 345 
g.’ Above mouse gray, tinged with pinkish 
DLL (5a MRE Sag a. x, Snr cote ee D. merriami 345 
h.’ Above buffy drab and pale buff........ D.m. ambiguus 346 
The ie blon eM Opeth: Sia! eh 2h! ta en a D.m. parvus 346 
me OE CATT IIOM yess ty ek cis. eke a D.m. simiolus 347 
Pe Ja blo € gyoghall- aks) gk! a) | D.m, arenivagus 347 
Nye so, Tek lhe ee Eh, (>on D.m. atronasus 348 
m.’ Above mixed pale ochraceous buff and 
jo ICL eee a D. m. melanurus 348 
348. phillipsi (Dipodomys), Gray, Ann. Mag. Nat. Hist., vii, 1841, 
Di 52a 
PHILLIPS’ KANGAROO Rat. 
Type locality. Real del Monte, north end of Valley of Mexico. 
Geogr. Distr. Valley of Mexico, State of Mexico, and States of 
Puebla, eastern Tlaxcala and western Vera Cruz, Mexico. 
Genl. Char. Size small; colors dark; tip of tail white. Skull: 
interorbital constriction very considerable; mastoids relatively small 
and separated on top of skull; superior outline arched. 
Color. Above sepia brown and ochraceous mixed with black: 
sides of nose, spot at base of ear, stripe across thigh, and under parts 
white; stripe across nose from base of whiskers and base of. tail 
black; tail black above and below, sides and tip white. 
Measurements. Total length, 270; tail vertebre, 168; hind foot, 
41. Skull: occipito-nasal length, 42; Hensel, 29.5; zygomatic width, 
22; mastoid width, 28; width of parietal, 19.5; posterior width of 
basioccipital between bulla, 5.5; palatal length, 17; postpalatal 
