SPILOGALE. 521 



Measurements. Total length, 250; tail vertebrae, 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 vertebrae, 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 5. ambigua; bands on thighs absent. 



Measurements. Total length, average of three adult males, 345; 

 tail vertebras, 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, 



p. 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 

 vertebrae, 144; hind foot, 44.7. Skull: Hensel, 47 ; zygomatic breadth, 

 33; mastoid breadth, 30.5; interorbital breadth, 14.5." 



*firizoncemartirensis (Spilogale}, Elliot, Pub. Field Columb. Mus., in, 



1903, p. 170. Zoology. 



*For description of 5. arizona, see Synopsis N. A. Mammals, p. 331. 



