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same habits. Franklin ground squirrel (C. franklini) : lives largely on 

 nuts, seeds and grain, but takes berries, vegetables, grasshoppers, crick- 

 ets, ants, young birds and their eggs and is said to kill young chickens. 

 Richardson ground squirrel (C. richardsoni) : feeds to some extent 

 on insects, especially grasshoppers. In its original unbroken prairie 

 habitat it did little damage, but with the encroachment of agriculture, 

 giving it cultivated crops as a new and abundant supply of food, 

 damage began in earnest. The annual loss caused by these squirrels 

 in North Dakota has been estimated at from $6,000,000 to 

 $9,000,000 per annum, in addition to $100,000 per annum expended in 

 fighting them and preventing depredations. 



Mearns furnishes the following items concerning the squirrels near 

 the Mexican boundary: 10 Arizona gray squirrel (Sciurus arizonensis) : 

 food "comprises seeds of pine cones, acorns, walnuts, berries and 

 green vegetation." Huachuca gray squirrel (S. a. huachuca) : "loves 

 to feed upon the walnut (Juglans rupestris) and often eats the imma- 

 ture nuts." Texas fox squirrel (S. niger texianus) : principal food is 

 pecan nuts and acorns. Arizona gray-necked chipmunk (Eutamias 

 cinereicollis) : in summer feeds "extensively upon green herbage and 

 the seeds of small plants, chiefly legumes, but, like most squirrels, it is 

 fond of an occasional change from vegetable to meat diet." Eats bacon 

 and fat salt pork about camp. Gila cliff chipmunk (E. dor sails) : "food 

 consists largely of the evergreen oak (Quercus emoryi)." Merriam 

 chipmunk (E. merriami) : feeds upon "various seeds, fruits and ber- 

 ries, but especially on acorns and pine seeds." Antelope squirrel ( Am- 

 mo sper mo philus leucurus) : eats yucca fruits, pine seeds and various 

 vegetation. Harris ground squirrel (A. harrisii) : eats mesquite beans 

 (cheek pouches of one contained 44 beans), yucca fruits and seeds. 

 Eats also flesh; poisoned by eating poisoned cougar carcass. South- 

 western rock squirrel (A. h. saxicola) : "cheek pouches usually dis- 

 tended with mesquite beans." Say ground squirrel (Callospermophilus 

 lateralis) : food largely green vegetation; eats scraps about camp, nib- 

 bles bacon and meat of all sorts and steals grain. Rock squirrel (Oto- 

 s per mo philus grammur us subsp. ?) : destructive to crops. "Omnivorous 

 as the bear, feasting alike upon flesh, carrion, grain or almost any 

 sort of fruit or green vegetation that chances to be in season." Eats 

 mesquite beans, berries of cedar and hackberry, grapes, walnuts, acorns, 

 grass seeds, corn, barley, green herbs, browse. 



10 Mearns, Mammals of the Mexican boundary of the United States, U. S. Natl. 

 Museum, Bull. No. 56, 1907. 



