W.B. Davis 1935. Elba, Cassia Co., Idaho. June 12. 399 next day I drove to the Will Wickel Ranch, about 1 1/2 miles north east of the Elba post office where I have been for the past week. On our way to Rupert we stopped whenever opportunity permitted to collect ground squirrels and marmonota, at a place about 7 miles south of Emmett on the road to Boise we found a large colony of C. idahoensis) and collected only two for records. They were living in an area entirely devoid of water and covered with Artemisia - well spaced with a good dea[illegible] of open ground - and grasses. Again about 14 miles SE of Boise we found another colony of C. idahoensis in an Artemisia and grass habitat - also devoid of water. At the locality each of Gooding the soil was sandy with both Atriplex and Artemisia present. No water was available, so it appears that H2O is not a necessary article for their success. In all other localities, save that each of gooding, the soil was of clay - almost a loose composition. This species) appears to me to have a wide range