SPILOGALE, 521 
Measurements. Total length, 250; tail vertebre, 68; hind foot, 
34; ear, 23. Skull: basal length, 38.2; Hensel, 36.6; occipito-nasal 
length, 41.5; mastoid breadth, 25.8; across postorbital processes, 14; 
palatal length, 15; length of first upper molar, 4.4. 
497. ambigua (Spilogale), Mearns, Proc. U.S. Nat. Mus., xx, 1897, 
p. 460. 
CHIHUAHUAN LITTLE SPOTTED SKUNK. 
Type locality. Eagle Mountain, State of Chihuahua, Mexico. 
Geogr. Distr. State of Chihuahua, Mexico; Mimbres Valley and 
Lake Palomas, boundary line. 
Genl. Char. Size small; ears short. Skull with fronto-parietal 
region elevated. 
Color. Similar in pattern and color to S. gracilis of Arizona, 
except that there is more black on tail beneath at base, and the 
spots on thighs and base of tail above are smaller. 
Measurements. Total length, 411; tail vertebre, 147; hind foot, 43. 
498. angustifrons (Spilogale), Howell, Proc. Biol. Soc. Wash., xv, 
1902, p. 242. 
NARROW-HEADED SPOTTED SKUNK. 
Type locality. Tlalpam, Valley of Mexico, Mexico. 
Geogr. Distr. Table-land in State of Guanajuato, to State of 
Chiapas, Mexico. 
Genl. Char. Size small; usually white bands on thighs absent. 
Skull slender, no prominent ridges. 
Color. Similar to S. ambigua; bands on thighs absent. 
Measurements. Total length, average of three adult males, 345; 
tail vertebre, 130; hind foot, 40. Skull: Hensel, 43; zygomatic 
breadth, 31.3; mastoid width, 27.5; interorbital width, 13. 
a.—tropicalis (Spilogale), Howell, Proc. Biol. Soc. Wash., 1902, 
Pp. 242. 
OAXACA SPOTTED SKUNK. 
Type locality. San Mateo del Mar, State of Oaxaca, Mexico. 
Genl. Char. Similar to S. angustifrons, but larger; skull with 
smaller teeth and larger mastoid capsules. 
Color. Like S. angustifrons. 
Measurements. ‘‘ Average of three males; total length, 378; tail 
vertebre, 144; hind foot, 44.7. Skull: Hensel, 47; zygomatic breadth, 
33; mastoid breadth, 30.5; interorbital breadth, 14.5.”’ 
*aurizone martirensis (Spilogale), Elliot, Pub. Field Columb. Mus., 11, 
1903, p. 170. Zodlogy. 
*For description of S. arizone, see Synopsis N. A. Mammals, p. 331. 
