Koford 1955 74 Cynomys ludovicianus March 17 1955. Nr. Ft. Collins, G. 16. 18 showed tracks out 4 in (same as yesterday); one had opened snow hole to surface N. of trap 15, but no tracks outside. Only other activity at a burrow 10 yds. W. of no. 6, when no activity noted before, or one 15 yds. S. of this (snow burrow or an unvisited burrow), then two connected by tracks. Much activity to 15 yds. away out in 3 directions from main burrow, 4 some scratching out at burrow mouth. Tracks to unused rocket corndung, but also to several spots where partly eaten opened Kankaimium Burrnold. Probably 20 of these seemed to be freely opened. There burns common at dry lake bed. Tracks also at no. ?, when tracks out to 5 yds., 4 green - healed stems of short Chryso- thamnes definitely eaten. Much ground with sheper's of Buckbi appeared, & near burrows, but apparently there not destroyed by Cynomys. N.E. Larimer G. 16. March 18, 1955. Clear warm. Muck meeting of snow. At about 9:15 a.m. arrived at Doe. 10 colony 1 mile W. of Rudy Ockerman's house. Area with prairie dogs extends from near N.E. corner of section a distance of about ¼ mile to 5.4 ½ miles to W., a few burrows at W. edge of Doe. 11. Ground 8/10 arrow covers, Brown covers blue grass, buff- also grows, ring mably, with spaces between up to 12" in more at some sites, 4 Atropos caespitosa, some growing 2' high but most- ly cropped to an inch or 2 high. No cattle present. Colony on gentle slope, mostly 1-3%, but on slopes up to 10% on border- ing hills. Little rock in soil or mounds, but rock exposed on western low ridges (shallower said limits steepness on steep slopes?). Two burrows about 8" diam., 4 perhaps bored out by Lepus or Tafidea. One set of 2 cornivore droppings, not fresh, picked up. 16 coyote carnivor tracks