Hill 



125 Feet of 



Birrro>f#Nest 



Thomomys f ossor 



yjhife River Plateau 



Rocky Mountains 



Colorado 



9-Sepf. 1901 



On east slope in open part 



of con i fergus woods 



10,000 FEET A.S. 

 E.T.5. 



Fig. 167 — Typical residential burrow of a Thomomys. 



574 



