Koford 159 Cynomys ludovicianus June 24, 1955. Weld Co., Colo. had been dug out to diam. about 10" to near end, probably by lodge or coyote. Shell & remains scarce, still having soft soil but little loam, lay on mound. Much ant activity, there appear, having low mound there at burrow site. No other sign. Sivaria or a fresh digging by C.L. due. Apparently new area of shallow burrows does allow easy predation! In this zone (where burrow & a C.L. seen earlier this year) vegetation taller & course was ground than in invaded area to W. of it. || In N part of CA', new burrow 24" deep under small ant midden, no other near. I staked off burrows found N. of E-W fence (about 24). || Water in bottom ditch about 10' wide (e.g. at 2W 205). One possible set C.L. trails in mud near water. || E. of E. fence, burrow family staked or for that E. is still farthest (in C'M). One in bottom must have been inundated but shows apparent recent scratching. An antrenis to S. of streambed just E. of fence, down to about 305/1E. I made overlay map showing details & location events. June 27, 1955 Nr. Ft. Collins, Colo. About 4 p.m. I visited loc. 4 c.ally 6 mi. S., 2 W., of town, where C.L. in barley field (formerly thought wheat). In the 100 yd. wide field on S. side of creekbed I saw 5 grown, 4 at one burrow (20 yds. down slope into field on uphill side) 6 large juncs. One grown one at burrow 40 yds. into field. || W. half of this long strip has been ploughed; grain very sparse this & about 3" high, + labels at some spots to 6". Heavy rains since ploughing. Many burrows there have been reopened by C.L. since rains. These mainly within 20 yds. of downslope (W.) edge, but some near center. I saw no C.L. burrow. Grass sparse - ave. 1 stalk / 2". No one persist there after ploughed, but maybe recently abandoned.