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SPERMOPHILUS TRIDECEM LINEATUS.— Mitchill. 



Leopard-Spekmophile. 

 PLATE XXXIX.— Male and Female. Natural size. 



Magnitudine Tamiae Lysteri ; supra striis octo longitudinalibus dilute 

 fulvis cum striis novem fulvis alternatum distributis ; harum quinque, 

 stria media at duabus utrinque proximis guttis subalbidis subquadratus 

 distinctis. 



CHARACTERS. 



Size of the chipping-squirrel (Tamias Lysteri) ; eight pale yellowish- 

 brown stripes on the back, which alternate with nine broader yellowish-brown 

 ones ; the five uppermost being marked with a row of pale spots. 



SYNOUrMES. 



Leopard Ground-Squirrel, Schoolcraft's Travels, p. 313, and Index, anno 1821. 

 SciHRCs Tridecem Lineatds, Mitchill, Med. Repository, 1821. 

 Arctomys Hoodii, Sabine, Linn. Trans., vol. xiii., p. 590, 1822. 



" " Franklin's Journey, p. 663. 



Striped and Spotted Ground-Squirrel, Say, Long's Expedition. 

 Spermophile, F. Cuvier, Hist. Nat. des Mamm. 

 Arctomys Teidecem Lineata, Harlan, Fauna, p. 164. 

 Hood's Marmot, Godman, vol. ii., p. 112. 

 Arctomys Hoodii, Fischer's Synopsis, p. 544. 

 Spermopeilcs Hoodii, Less., Mamm., p. 243, 654. 



" " Desmarest, in Diet, des Sc. Nat., L. p. 139. 



" " F. Cuv. et Geoff., Mamm., fasc. 46. 



Arctomys Tridecem Lineata, Griffith, sp. 641. 

 Arctomys (Speemopbihis) Hoodii, Rich., Fauna Boreali Americana, p. 177, pi. 14. 



DESCRIPTION. 



In form this species bears a considerable resemblance to the very com- 

 mon chipping squirrel of the Atlantic States ; by its shorter ears, how- 

 ever, and by its longer nails, virhich are intended more for digging than 

 climbing, it approaches the marmots. The head has a convex shape and 

 is very much curved, especially from the forehead to the nose ; the nose 



