Koford Cynomys ludovicianus January 23, 1955 Nr. Ft. Collins, Larimer Co., I saw no fresh appearing burrows or C.L. troches. No brush, tall grass, boulders, or other cover. This drains into Fossil Creek. Her earthen den at S. end of draw. No coyote sign or badger sign. (One burrow at Well- sington of badger size but old). January 25, 1955 Partly overcast but no wind so rather warm in afternoon, at 3:30 p.m. I visited Spring Canyon Dam colony. (Sec. 33, T7N, R69W) and saw 3 prairie dogs out. Two at one burrow of E. group; one near N Wedge colony. Examination of snow revealed many troches, some having been made in on hard snow (barely sink in) 4 others on softened (sink deep). Spaces to 10 yds. apart between snow patches but great aspect about 9/10 snowy. Troches near some burrows S. of fence line where I had not seen them before. Apparently much activity on warmer days. No fresh construction apparent the melting snow just ground. Mounds of (many) rodent scratched appearance. Not obvious what eaten. Opened cockle burrs (Xanthium) near burrow, but burrs very com- mon that area. Weed burrow had obvious quantity of droppings scattered near it. Rootstocks of Buckwheat seemed to be eaten. No green food apparent. Probably could crop some line a warm day. I visited groups of mounds inside NW of this colony - Sec. 29, SE¼. There in wide rounded valley leading N. toward Divers Pass. I found no signs activity but did not visit northern half of colony. Soil had fine rocks & was dark in color with fine texture. Heavily grazed pasture. Some