Ro ford 97 Cynomys ludovicianus April 25,1955 NE Larmier G., G/o. small burrows or of Depodema or Citellus tridecemlineatus. One steel trap on Dec. 23 took 3 species. Shot a lepus taurinus at nearth C.L. burrow thinking it a C.L. (07 tester 35 mm. long), I think that some burrows broken out at one side have been dug out by these hares. Several hared hares seen on colony in Sec. 10. One nest nearly finished (or ground in colony, 20 yds. from burrow). Visited Dec. 24, 5 mi. NE Wavely, which was poisoned 1953. I found no sign of prairie dogs in area. Burrows widely spaced. Good pasture condition & widely spaced burrows - is poisoning most effective when pasture condition good? Brewer grass been eaten at Abernathy's or CPER. N.Ft. Collins G/o. April 26,1955 Arrived Spring Canyon Dam colony 9 a.m. 4 saw 10 C.L. out. New green aspect with burrows standing out be- cause of contrast in color. Saw 1 at #36, 2 near #33, 2 near #10, 1 near #16, 2 near #17, 1 near #12, 1 at #3, 10 at boat 10 left. No more. Short area wheretrapped. At 10 a.m. visited Faral Creek area, Sec. 4. Shot one (07 74) at edge planted field. Saw at least 8 on planted field slope (facing S.) 4 stop slope, some much tracked burrows in field were 100 yds. from unploughed ground. Bot- hing here apparently before last rains - probably in March. What(?) about 4" high. C.L. make shallow digging mostly or if not often seed, but blades; a few new burrows about 0" deep on slope. Burrows spacing 20-30 yds. in parts this field. The 8 in area of about 5 A. Some fled 50 yds. out of field & to flat (uncultivated) below where many burrows. Another more recently planted grain field 300 yds. to S. also being used by C.L. I took photos of burrows this earlier in this month. Ever grasses of what