MAMMALS OF MINNESOTA. 165 



Sub-genus ICTIDOMYS, Allen. Ears generally small,sometimes rudimentary; 

 tail long, cylindrical, or narrow and flattened, or quite broad, with 

 the hairs one-half to three-fourths the length of the body; skull very 

 long and narrow; first upper premolar usually rather small, and the 

 dentition not heavy." 



It will be seen that there are but two species, S. franklini and 

 S. tridecemlineatus, whose range brings them within our limits, 

 although specimens of one of the varieties of S. richardsoni 

 might possibly cross our northwestern boundary. Both the 

 species above mentioned may be found in suitable localities 

 throughout the state. The 8. franklini is less fossorial, and 

 being a more conspicuous animal, is soon destroyed in thickly 

 settled regions, while the great fertility and more subterranean 

 habits of the leopard gopher, enable it to hold its own in spite 

 of the best endeavors of the farmer and the army of boys and 

 dogs who pursue it in the vicinity of towns. Their curiosity 

 being the one failing which enables boys of exceptional pa- 

 tience to snare them at the openings of the burrows into which 

 they have been seen to plunge. 



Spermophilus tridecemlineatus MITCHILL. 



PLATE X. 



Sciurus tridecemlineatus MITCHILL,, Med. Repos., xxi, 1821; DESMAREST,. 



Mamm. ii, 1822. 

 Arctomys tridecemlineatus HARLAN, Fauna Amer.. 1825; GODMAN, Am. 



Nat. Hist, ii, 1826. 

 Spermophilus tridecemlineatus AuDUBONand BACHMAN, Quad. N. A., i, 1849; 



HOY, Pat. Off. Rep. Agr., 1853; KENNICOTT, ib., 1856; 



BAIRD, Mam. N. A., 1857; THOMAS, Trans. Ill State Agr. 



Soc., 1860; ALLEN, Proc. Bost. Soc. Nat. Hist., 1870. 

 Spermophilus tridecem. var. tridecemlineatus ALLEN, Proc. Bost. Soc. Nat- 



Hist., 1874; Monographs N. A. Rodentia : 1877. 

 Arctomys hoodi SABINE, Trans. Linn. Soc., 1822; Franklin's Journal, 1823; 



FISCHER, Synop. Mam. 1829; WAGNER, Schreber's Sau- 



gethiere. 



Arctomys (Spermophilus) hoodi RICHARDSON, Fauna Boreali-Amer., 1829. 

 Spermophilus hoodi F. CUVIER, Suppl. Buffon. 1831; MAXIMILLIAN, Reise 



N. Amer., 1839; Archiv. f. Naturgesch. , 1861. WAGNER, 



Suppl. Schreber's Sauget., 1843; BRANDT, Bull. Physico- 



Math. Cl. Acad. St. Petersb., 1844: SCHINZ. Syn. Mam., 



1845; GIEBEL, Saugethiere, 1855. 



A full-grown female measures as follows: Head and body, 

 7.25; tail, 4.15; total length, 11.40; hind foot. 1.50; fore foot, 

 0.85; longest fore claw, 0.30; nose to eye,0.80; nose to ear, 1.50; 

 nose to occiput, 2.0; night of ear, 0.30; longest hairs on the 



