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. 
KEY TO: THE-SPECIES: 
A. Hind foot with four toes. 
a. Under parts white. PAGE 
emebOWe SEPia, DIOWM. 05. 26.2. sae. ens eee de D. phillipsi 343 
poenove golden clay Colors. «d,s ck ee we D. ornatus 344 
ce.’ Above mixed brownish clay color and 
(5308 NS sng OA SR Ii EE a Pe D. perotensts 344 
d.’ Above yellowish brown and black......... D. mitchelli 344 
e.’ Above pale yellowish brown................ D. deserta 345 
f.’ Above ochraceous buff and black......... D.spectabtlis 345 
g.’ Above mouse gray, tinged with pinkish 
ee A als ete Gils hs Swine mca dees D. merriamt 345 
h.’ Above buffy drab and pale buff........ D.m.ambiguus 346 
2D STeS CM oy ala 2) a a D.m. parvus 346 
See CIOMAMON feo... ek die oe ad ee ens D.m. stmiolus 347 
Peeeeove pinitish DUM... 6a. ewe ee. D.m, arenivagus 347 
faerepove dark clay color......... 0.2.4. D.m. atronasus 348 
m.’ Above mixed pale ochraceous buff and 
Beebe Se Nese: <I 2th cree es, ss D. m. melanurus 348 
348. phillipsi (Dipodomys), Gray, Ann. Mag. Nat. Hist., vii, 1841, 
Pp. 522. 
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 vertebrze, 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 bull#, 5.5; palatal length, 17; postpalatal 
