W.B.Davis 1936. 5/17 Specimens examined from Idaho in the Amer. Mus. Coll. by R.M. Gilmore, 1935. Microtus pennsylvanicus Mt. Jefferson, 5 mi. S Montana line, 6500 ft., Jefferson Co. orig. no. 181 120654 ⚠ ad. 170-47-20-11 Tubercles 5/6. wet grass near stream, Aug 1. 182 120655 ⚠ ad. 165-43-20-10 Mammal 8, 4 pr., 5 emb x 20. wet grass near creek " " 183 120656 ⚠ ad. 177-48-21-10 Mammal 4 pr., 5 emb x 20. " " " " " " 184 120657 ⚠ ad. 165-45-21-10 wet grass near creek Aug. 1. 215 120658 ⚠ ad. 160-35-19-11 wet grass near willows and aspenus Aug. 5. 217 120659 ⚠ ad. 170-45-20-10 wet grass, willows, aspenus Aug. 6 232 120660 ⚠ ad. 168-48-20-9 Lamp grass, bank of stream. Aug. 8. N fork Snake River, 10 mi. SW Island Park, 6200 ft., Fremont Co. 123 120650 ⚠ ad. 183-53-22-11. wet area at edge of river-grass Tb. 5/6 July 19 154 120652 ⚠ ad. 150-38-20-10 wet grass near river). Tb 5/6 July 25 45 120656 ⚠ 144-32-19-11 Rushes at edge of swampy stream. Juste large Tb. 5/6 July 7 134 120652 ⚠ 155-39-21-10 wet grass at edge of stream Tb. 5/6. July 22 Microtus montanus nanus N fork Snake River, 10 mi. SW Island Park, 6200 ft., Fremont Co. 153 120651 ⚠ 145-36-19-9. wet grass near water. Tb. 9/6 July 25. 158 120653 ⚠ 160-40-20-10 In meadow under hay shock. Tb 5/6. July 26 5 mi. W St Anthony, 5000 ft., Fremont Co. 120661⚠ 153-42-20-10. Heavy grass in grain field. Tb 5/6 July 12 Black Springs Cr., 4 mi. W Ashton, 5200 ft., Fremont Co. 383 120815⚠ (108)-[12]-17-8 Heavy grass and weeds near irrigation ditch. Tail a stump. Tb - 5/6. Oct. 6.