148 



CITELLUS. 



Measurements. Total length, 233; tail vertebrae, 58; hind foot, 

 39. Skull: total length, 41; Hensel, 33; zygomatic width, 25; inter- 

 orbital width, 15; palatal length, 18; width of braincase above 

 zygomata, 20; length of upper tooth row, 8; length of mandible, 

 angle to alveolus of incisor, 19; length of lower tooth row, 7.5. 



D. Otospermophilus, Brandt. 



"Skull broad; molars small; edge of outer wall of antorbital 

 foramina not thickened; coronoid processes of lower jaw long and 

 slender; ears very large; tail long, full, bushy." 



FIG. 27. CITELLUS IOTOSPERMOPHILUS> VARIEGATUS. 



No. (1250) 4944 Field Columbian Mus. Coll. Nat. size. 



111. variegatus (Sciurus), Erxl., Syst. Regn. Anim., i, 1777, p. 421 

 Nelson, Science, 1898, p. 898. 



