SYNOPSIS OP THE 



Arctomys Liidoviciani, Ord. Guthrie, Geog. v. 303; Afc- 

 tomys Missouriensis, Warden, U. States, v. 6. yi. 

 . Prairie Dog, Lewis and Clarke, Exp. Missouri. 



Icon. Nobis. 



Inhabits North America. 



643. 13. A. Latrans (Barking Marmot.) Uniform brick- 

 red, lighter beneath ; cheeks furnished with pouches ; a 

 few long hairs are inserted on each jaw, and directly over 

 the eye. 



Arctomys Latrans, Harlan, Faun. Amer. 306. 



Barking Squirrel, Lewis and Clarke, Exped.yi. 175. 



Icon. 



Inhabits Missouri. 



Obs. Perhaps a Spermophilus, but it lives in society. 



Several other Marmots have been mentioned by dif- 

 ferent writers ; but as their great leading character of 

 dentition is not noticed, they have been rejected from the 

 genus until better authenticated: of these are the Hoary 

 Marmot of Pen. Quad. ii. 130; the Marmot Gundi, of the 

 same, pi- 137 ; the Tailless Marmot, of the same, p. 137 ; 

 the Mus Maulinus, of Molina Chili, 268 ; the Glis Tscher- 

 kessicus, of £r<z'/e6.; and the Orctomys Missouriensis, of 

 Warden's United States, t. v. 627. 



Among these, also, we shall insert the species, or variety, 

 we have noticed at p. 170, of Vol. iii, and figured under 

 the name of Marmot Diana. 



SciuRcjs. Incisors f ; canines -g^; cheek-teeth ||=: 22 ; 

 upper incisors flat in front, and wedge-shaped at the extre- 

 mity ; the lower pointed and compressed laterally ; cheek- 

 teeth tubercular, the fives in the upper jaw found only in 

 the young state ; body small ; ears erect ; head small ; 

 eyes large ; anterior feet with four long toes, and a tubercle 

 instead of a thumb ; the posterior v.ith five long toes, all 



248 



