Roford Cynomys ludovicianus October 10, 1955 9 mi. N. Waverly, Larimer Co., Colo. 8 1/2 mi. N. + 1/2 mi. W. of Waverly, I set 12 traps for C.l. Vegetation Type is Muhlenbergia & Eurybia latata, thistle, arnica, + fair present. Ground cover 40% cent. No fresh carrion drop pings or fresh badger diggings noted. Saw 1 33" Catulin on ground close to burrows; stomach empty. On this colony estimate highest densities 7 per A., + 4 per acre common for many acres. 11 This area, Salix laurifolia, Much still grew. Unused burrow show conspicuous growth on muds. Chipmunk left. mostly dry now, Seen Sphairidium common. (sec. 10) October 11, 1955 Visited traps 10 a.m. Clear, but 30 mph W. wind. No C.l. seen out. One trap held a Sylvilagus (released). No others spring, or tracks badger man. I saw a Lepus townsendi from a burrow, later dry in past apparently. Several aspect-green here. Sheep grazing in Sec. 13 (no sign C.l. likewise). Set 2 new traps Sec. 10 colony. October 12, 1955 Idea: C.l. feeding not equivalent to that of cattle because death returns organic matter to soil, not removed as when cattle graze, removed elsewhere. Mint, laves, amount to considerable fertilizin. 11 Freshly dead Catulin on road near Sec. 13 burrows, but stomach empty. I scotched a raga at Sec. 13 burrows — was the mouse there a transient? Clear, cool & calm today. 11 in Sec. 10 in area where Atriplex 2' tall, I saw 2 burrows with 5 C.l. each at them. These near foot of gentle slope at edge flutter areas. Plants present: Atriplex, Eurybia,