Koford Cynomys ludovicianus April 28,1955. Nr. Ft. Collins, Colo. in more newly planted field on S side (N. aspect). Latter two appear ently occur, visited same burrow in field. The 13 were in area of 3 acre only. They started to run when car 300 yds. distant, most running downhill out of field to flatter unploughed ground. Then out of fright of car fled at approach by car to 200 yds. Faint greenish aspect to their bellards. I took photo (35 mm. [illegible] photo of it. "Elatichane") of it. Apparently this slope on N. side of colony more used than opposite, the ploughed larger, 20% & having short or grain blades. // I set 5 steel traps near burrow in field on S. side colony, hoping to see what sort grain eaten. Digging only about 1/4 inch deep but sometimes as much as 4 feet along nest row dug up [illegible], rather methodically, in straight line. Two burrows 10+20 yds. from edge field were on faint nearly straight paths leading to unploughed ground at edge. Many burrows in steep unploughed area - there seemed to be C.L., judging by droppings, the mound material all as on S side & slopes estimated 20% (dig a steep slope near good food supply like grain?) (See 33) // In area 300 yds. W. of county dump, I set 2 steel traps at 1 burrow where I saw 1 C.L. Saw another 100' from site. Apparently a few only but when many old burrows. Most used section burrow had other used burr rows near - to 40 yds. E. of it, 40 yds. downslope, 430 yds. upslope. In this area much died Buckle & Muhlenbergia, 6" tall Allium, 6" Carya in lawn spots, some green Buckle, two kinds Lactuca, Cogonella (? - one yellow flowered, glebrum; other white flowered, pubescent, much less common). // I returned to these traps 2:30 p.m. & found Spectre in one. Released, it ran down the burrow out of fright - into appar- ently occupied burrow. Set a third trap 50 yds. N.W. of the two. The (3 p.m.) visited same colony as this morning.