Roford 1955 71 Cynomys ludovicianus March 11, 1955 Nr. F.B. Collins, Colo. more troops in Spring Canyon Dam colony (nos. 23, 24, 25); at this colony I saw 3 out at 7:10 a.m., ran trapline 1:30 to 2 p.m., saw 6 out at 1 p.m. Retrieved 5 p.m. + checked all traps but trap now spring. 20 out now; mostly no.1 steel traps but 4 at no. 0. 1/4. 0 seems lone skull or pull out a cotch only tips two. No bait used. March 12, 1955. Warm & clean, at 10 a.m. I saw 7 out at Spring Canyon Dam colony, 2 N. of fence on E. side, the others scattered in S. part colony. Visited traps & took 34 from trap 22, 35 from trap 21. There in addition to the 7 seen. Both in burrow, caught by one hind leg. Both put in small cage; some minor fighting & snarling but apparently no bennestone. Burrow of trap 6 shows no further cues; evidently occupied by only 1 (captured) in winter. Since waning of weather, the winter burrows peripheral to winter used (snow tools) were used - such as near 24, 25, 20, 21. Burrow where we saw today is 80 yds. NNE of #8 (used winter). Still much digging to 2 or 3" deep near and on edge some wounds. Two had 1/8" diam. white root chewed at bottom of digging. March 13, 1955. CPER, Weld Co., Colo. Visited Doc. 22 colony to mop at 10 a.m. Several C.L. out, some within 5 yds. of shut down live traps. All snow melted & some water standing in creek bottom. No green fobs seen yet. Much evid- ence of satirigs breaking off opuntia leaves. Some burrows at does fine parts of W. fine may be of C.L. I picked up 2 groups old coyote seats on colony. Saw an Aquila sun colony at about 11:30 a.m. Some greening now starting in wheat fields. At about 4 p.m. visited Spring Canyon Dam colony and found 3 or 4 in steel traps #7, 36, 37, 42, in trap 15, where no acti-