Koford 1955 61 Cynomys ludovicianus March 3, 1955. Larimer Co, Colo. rida, leafy portion only as far wide as high. I photog one with 4" high composite growth. Main ground cover is Bartolova gracilis. This has seed stalks 12-18" high so probably no-growing line aquipyron smithii lost year. A course 2' high grass, common. Grass cover at this season covers about 50% of ground surface between Laramie. Photog a group of mounds on 16% N. slope at 5, edge of colony (uphill edge). Further uphill steep 4-gro soon gives way to brush. Colony about 400 yds. E + W, 300 yds N+S. N. edge near cottonwoods & willows along streams. Slope of most of colony is 10%. No sign of prairie dog activi ty lost year or+. Some plants Bartolova & tall grass on mounds. Comparison vegetation on mounds between, 4 on adjac Acta trinervis, Chrysopodium, Polygonum, on some mounds. ent areas could be made. How long ago was C.L. killed out? || At 8:45 a.m. clear, sunny, fairly warm (50°). At 5 p.m. Canyon Dam colony I saw 8 out. At 11:30 a.m. at least 3 out, 41 (224) in Top #8; shy 5/10 overcast them. March 4. Nr. Ft. Collins, Colo. At 8:30 a.m. visited Spring Canyon Dam colony. Calm wind in good weather. 4/10 overcast semidry mod., breezy, semi- shine. I saw at least 11. Most activity on north of troppin area. For example, 2' about 100 yds. west of T18 & another 50 yds.W; one and lummus at larger distance. One in lummus 40 yds. W. of T2 (one at burrow of T2). Two 50 yds. SE of T7. Two 100 yds. NW of T13. In topped area, two seen near T10, two near T11. After one runs 100 ft. fairly straight & fast. Social contacts - one running to man, another as if for recognition - common. Some forage on marg rocks 6-8" high. Air temp. +1°. at 9 a.m.