Koford 260 Cynomys ludovicianus September 13, 1955 Mr. Ft. Collins, Colo. Visited Spring Canyon Dam colony 2:15 p.m. Saw at least 10 C.L. out. Warm, 9/10 overcast; about to storm. Buffalo grass & dam mostly brown now, so general aspect green-brown. Salvola, Sphaerula, Chrysothamnus allr., an aster, Liatris punctata, Baccharis, Eriophyllum, Applopoppur, Eriogonum (?), Crugonium, are green. In blow: Aster (crucifer?), Lactuaria, Chrysothamnus, Lotus, Applopoppur, Eriogonum (white flawn). On mds. principal plants Salvola, Sphaerula, Chrysothamnus, 4 on low ground around mound. Fresh dog or coyote droppings one mound (fruit, hair). Dried up canons of jirv, C.L. found on mds. Aristida rare on main colony, but much on SW slope in area over past to 5, where an extension of colony now. I saw a Berti's flying low on colony. At centre large root of Salvola dug up (by C.L.?). Map of extension. [hand-drawn sketch with arrows, measurements, and labels such as "278°", "90 yds", "2500", "62 yds", "road", "slope", "draw", "off the dirt road", "center of pass", "Aristida 30%", "Bda 50%", "60% Bda", "170 yds", "200 yds", "5, 170 yds wide", "slope about 50%", "principal vegetation is Bda", "relatively few lumana & flowers", "Aristida zone (W-shape)"] Expansion zone about 200 yds. to 5, 170 yds. wide. Bda occupies slope about 50% where principal vegetation is Bda, relatively few lumana & flowers used in Aristida zone (W-shape). I saw at this C.L. near center expansion zone. (PER Weld. Co. Colo September 14, 1955 Area of colony here now drier appearing. Much Salvola starting to dry or flawn, & Bda drying. Bgras