Koford Cynomys ludovicianus May 14, 1955. CPER, Weld Co., Colo. 30+50 yds. E. of 22 S. mark. There is opened up burrow at S. edge of E. cattle shelter row (seen last visit 2 wks. ago too). Many apparently new burrows, or enlarged, with mound only on one side of hole, in small quantity, ground dry & hard. Three seen together in slits on flat bottom as if running on lollipops in bare earth, // at E., and a new burrow 40' SE of 4E24S. stake, at W., and 1 new in area 2 chains W. of 28W, 2N. Feeding in grain on sloper grass with Muhlenbergia, not in greenest areas of bottom. No eagles or hawks seen. Saw 1 Citellus 13 - levistius near 32 W. mark (not in C.L. colony). No burrowing birds seen this day. Canvass dropping commas but all old. // I visited Deer ranch 4 miles N of Rockport when grazing by cattle. Many C.L. here - the poisoned with Diphtheria grain every year. Mr. Oscar said long ago poisoned & cleaned out. Then about 1938 one burrow started. He had never seen ferret live there, he knew what they looked like. He has lived this place since 1908. He likes to hear a few C.L. around as tourist attraction. Diphtheria strychnine because of organizing deaths. I shot a cat for examination. Weld Co., Colo. May 16, 1955 At Deer ranch near Rockport shot a 07+2, Many C.L. here & comparatively tame. Many allow approach to 30 yards. Saw 1 Syllicolagus burrow. May 17, 1955. Nr. Ft. Collins, Colo., At 10 a.m. visited colony near dump. I saw 4 C.L. There are burrow about 40-75 yds. shot of SE extremity of one about same distance short of NW extremity. There may be all that remain. Groups 300+ yds. apart. No young seen. Visited Sec. 4 colony 1 mile S. of dump. Saw 2 at one burrow in wheat field, S. side bottom. Wheat still