1911] Taylor: Mammals of the 1909 Nevada Expedition. 217 



External Measurements of Citellus mollis From Humboldt County, 



Nevada. 



For method of taking measurements, see Introduction. 

 All dimensions are in millimeters. 



Total 

 length 



202 



207 



199 



200 



220 



207 



204 



205.6 



190 



197 



189 



209 



203 



201 



198 



195 



215 



234 



203.1 



204.0 



Tail 

 vertebrae 



55 



57 



48 



51 



60 



55 



56 



54.6 



47 



48 



48 



53 



53 



52 



49 



45 



58 



61 



51.4 



52.7 



Hind 

 foot 



35 



34 



35 



33 



31 



33 



33 



33.4 



33 



32 



32 



32 



35 



33 



32 



32 



37 



34 



33.2 



33.3 



Distribution.- — This pretty little ground squirrel was perhaps 

 the commonest mammal on the fiat of the high desert plateau. 

 At Winnemucca on ]\Iay 11 quite a number were observed. They 

 were seen at intervals all along the stage route from AVinne- 

 mucea to Quinn River Crossing. Thej^ were fairly common at 

 Big Creek Ranch and at "Wheeler Creek. None were found by 

 our party above 4400 feet. A very careful search for the 

 species during our short stay at Alder Creek Ranch (5000 

 feet) revealed burrows wiiich were supposedly those of mollis, but 

 the animals themselves were not observed. Apparently they 

 decrease in mimbers as the mountains are approached. We 

 found them more numerous at AVinnemucca, Amos, and Quinn 

 River Crossing, each several miles from the mountains, than at 

 any of the foothill stations. A juvenal was shot on Table Aloun- 

 tain, altitude approximately 6000 feet, near Virgin Valley, on 

 June 7. An adult (no. 8315) and a very young juvenal (no. 

 8314) were secured in Virgin Valley (5000 feet). 



