Koford Cynomys ludovicianus January 2, 1954 December 30, 1954 Nr. Fb. Gillin’s, Colo. At about 3:30 p.m. I again visited the Spring Canyon Dam colony. The snow was now much more melted than 3 days ago & large patches ground bare. Many more prairie dog tracks than then. C10 had no tracks near it, but C13 and 13 others were connected by tracks. There 14 burrows north of fence and within an area of 90 X 50 yards. Some continuous tracks between burrows went fairly straight for 50 yards or more. At least 10 sets tracks connecting some burrows. Obviously many that had had no tracks Dec. 30 now had them. 16 new construction noted. C10, that had tracks Dec. 30, now had none. Wind apparently demolished tracks (including mine) of Dec. 30. Some tracks in groups of 4 saws—showing jumping locomotion, about 18" jumper (tip to tip). Some tracks out + back to same burrow, to 10 yds. out. No tracks connecting this western group with the eastern group. In that gp. only C7, H8, had tracks last time, but now C4 had 10+ sets tracks, M5 & M6 also had tracks, tracks to old crater near M5, 4 second sets tracks to— ward M3. M3 (1 track last time) had fresh scratching out of mud at mouth burrow. No new well-formed construction. At C1 about 5 sets tracks; C2, 10 sets. Last 2 days fairly warm (40°F.) & sunny and mounds entirely clear of snow. One digging about 4" into soil was seen (western gp.). None seen out (to 4:20 p.m.).