to Mr W Anderson 1934 Reithrodontomys megalotis longicaudus. 2. grocery hill slope of the north side of Strawberry Canyon. All but two traps set in this type of habitat were filled with these mice. They were found in the locality that we had previously used for our Microtus study but since that time the condition of the grass had become much drier and consequently driving out the Microtus. There were numerous trail and burrows as evidence of the old habitation of the Microtus.