80 Bailey — Tiro Neic Pocket Gophers of the Genus Thomomys. 



tion. Collected May 14, 1896, by Clark P. Streator. Original number 

 oil)!). 



General characters. — Size of aiireus or a little larger, hind foot 30-33; 

 colors ashy or pale huffy gray ; lower parts white. 



Color. — Upper parts pale huffy gray, with dusky ear-patch and brown- 

 ish nose; lower parts, feet and tail wiiitish. 



Skull. — Like that of aureus, but palate flat instead of arched between 

 the molar series ; interparietal larger and more quadrate; buUfe sliglitly 

 larger; anterior points of frontals less acute. 



Measurements. — Type, total length, 242; tail vertebra^, (54; hind foot, 

 33. Adult female from type locality, 215; <J4; 30. Skull of type, basal 

 lengtli, 41; nasals, 15; zygomatic })readth, 28; mastoid breadth, 23; 

 alveolar length of upper molar series, !). 



Remarks. — In color canus closely resembles the gray phase of its near 

 neighbor, nevadensis, l)ut in cranial characters it shows close relationship 

 with aureus. 



