Koford Cynomys ludovicianus May 5, 1955. NW weld G., G/o. [illegible], the heavily grazed so conspicuous over most of area, a few small fallow. Apparently [illegible], green, damp, slopen (not out on flat), 105). Water in ponds surrounding mud shows no C.L. tracks. A stitch, yellow pansy, Lecocorinina, in flower. One burrow at base of fencepost of N. fence opened, 4 others in area. Several burrows on flat bottom (no mounds a in bottom of 6" sunken spots) had been opened & closed out, much old ephemeral scratches out. Probably high water table at some season keeps mounds from forming. Some burrows under Pogononyx mounds. Been expect to colony now. May 6, 1955 Nr. Ft. Collins, G/o. Visited with Ronald Smith, good student of Boulder, Wellington colony & 2 in Fossil Creek area. At dump colony (SE ¼ Sec. 33) took 5710 2 in traps. Apparently it got in yesterday, for fly below around face. It was nearly dead, about an hour later it could squirm about, & heart beat 80/minute, but body temp. 70°F. I left it in cold (near freezing) room & it was died by 4 p.m. Another of 6 traps hold a Syllophorus 37 (dead, head gone), tester about 30 mm. long. Reset traps same dates. 11 at wheatfield in Sec. 4, shot 5710 3. It ran 30+ yards. To burrow near upper edge field & shot there. Still many diggings of wheat rows here. Idea - burrows here on 40 yards, with strip at S. edge wheat field so are on especially steep slopes for this area. There is invaded wheat field above unploughed strip. So, do does food above cause or allow C.L. to use these steeper slopes? - not limited by physical factor? Ron Smith told me of colony in Left Hand Canyon about 15 miles from Boulder. He said C.L. in rocky steep & rocky slope.