753 Eutamias sonomae (1) Gilmore 1933 Mad R. Ford, 2700 ft., above Ruth, Trinity Co.; Calif. May 20, 1933 Spec. no. Very taken in heavy growth of manzanitas at waters river's edge; Was detected by sharp shrill squeak; regularly repeated. Sexual calls heard nearby but no others seen. Spec. no. 2681 has 4 pairs mammae: 1 inguinal, 2 abdominal, 1 thoracic. May 29, 1933 Trapping around rocks, brush and timber at head of canyon on west slope of Horse Ridge at 5500 ft. resulted in capture of this form. Despite the high altitude and presence of White Fir & Chinquapin these chipmunks were common. Same traps taking Eutamias also caught Nestoma fuscipes. Captured in the dry lot Firck and Chinquapin association as well as in old stump shady timber habitat.