33^ Bulletin American Museum of Natural History. [Vol. V.] 



port, Lake Co., California, March 20, 1893, kindly placed at my 

 disposal for study by Prof. Charles H. Gilbert, of Stanford 

 University. These specimens were at first regarded as greatly 

 overstuffed examples of S. a. gambelii, till an examination of their 

 skulls showed the fact to be otherwise. S. robusius requires no 

 comparison with other species beyond that already made, its short 

 tail, relatively small ears, robust body, large feet, and small 

 auditory bullae, at once serving to distinguish it. It would seem, 

 however, to much resemble S. boylii in size and coloration, but 

 the latter is described as having a much longer tail much longer 

 than head and body instead of much shorter, as in the present 

 species. 



