loo SPERMOPHILUS. 



139. tridecemlineatus. (Sa't/rus), Mitch. Med. Rep., 1821, p. 248. 



hocdi, Sabine, Trans. Linn. Soc, 1823, p. 590, pi. 29. 



Type locality. Upper Mississippi; central Minnesota? 



Geogr. Distr. Central North America; eastern Michigan to Mon- 

 tana and Colorado, and central Texas north to Saskatchewan Plains 

 in Canada, and in prairie region of the Mississippi from Ohio to Min- 

 nesota. 



Gcnl. Char. Slender; ears small, auricle merely a projecting 

 rim: tail little more than half the length of body and head. 



Color. Above dark brown, ranging from chestnut to nearly 

 black; along back are seven yellowish white lines, alternating with 

 six rows of yellowish spots; rest of body pelage buff or ash buff. 

 Tail black above, and beneath varied with chestnut and fringed with 

 white. 



Measurements. Total length, 252; tail vertebra, 88; hind foot, 33. 



a.—pallidus. {.S/>ermop/nlus), Allen, Proc. Bost. Soc. Nat. Hist., 

 1874, p. 291. 



Type locality. Plains of lower Yellowstone River. 



Geogr. Distr. Wyoming south to Texas and east to Missouri, 

 on the plains and desert regions. 



Genl. Char. Small; colors pale; light stripes white and wide. 



Color. Very similar to ^. /. olivaceus, possibly slightly paler; 

 tail, above black and white mixed, narrowly bordered and tipped 

 with whitish; below chestnut; subterminal indistinct black bar, sides 

 fringed with whitish; tip same hue. 



Measurements. Total length, 210; tail vertebrae, 75;hiDd foot, 32. 



h.—olivaceus. (Spermophilus), Allen, Bull. Am. Mus. Nat. Hist., 

 1895, p. 337- 



Type locality. Custer, Black Hills, South Dakota. 



Geogr. Distr. South Dakota. 



Genl. Char. Similar to S. t. pallidus, but darker. 



Color. Above dusky or blackish brown; flanks, stripes and spots 

 pale buff, tinged with olive; beneath buff. Basal half of tail above 

 black and white mixed, narrowly bordered and tipped with whitish; 

 below dark buff, subterminal black bar; sides fringed with whitish, 

 tip same hue. 



Measurements. Average total length, 252; tail vertebras, 89; hind 



foot, 34.5. 



c— parvus. {Spermophilns), Allen, Bull. Am. Mus. Nat. Hist., 1895, 



P- 337- 

 Type loealitv. Uncompahgre Indian Reservation, northeastern 



Utah. 



