Koford 196 Cynomys ludovicianus July 25,1955 Wind Cave M.P., S. Dakota. if works most at periphery + isolated invasion areas, tends to spread more than walking throughout colony. Area W, isolated; 1 lodges dug hole = shot story? // At Custer, S. Dakota, talked with George Barnes & Harold Haecker, of Mitchell, about prairie dogs, firefly, bad gins, coyotes, control. Accompanied them to dog town of about 60 A., 3 mi. N. of Fairbun, Custer Co., to poison C.l. there. Barnes said that near 1958, many die about arm's length into burrow, few on top of ground. With strychnine, many die atop ground. // Barnes said that S. of Scottsbluff, Neb., many C.l. until at least 1976, many large mounds there. Sometimes F&W Service rodent control was station- ed there. Between Philip & Midland are also large mounds, said Barnes, perhaps due to past C.l. activity. Barnes said that near Smithwick, Fall River Co., he had seen where C.l. had cut "lane" (= milkwaine?). // Fairbun C.l. town had been there since at least 1940 or '39 (Barnes). Densuch had not allowed poisoning C.l., but shot them with rifle. Another man (Loemisser?) now running place. Poisoning work done free by F&W Service (follow-up of earlier control program). Colony about 60 A., about 1/4 in bottom when there was a barley field, partly harvested, the rest dry. C.l. thought it barley & had apparently cut much at height 2-5," so looked like mowed short. One area 40 yds. x 40 yds. entirely cut out, at edge field. Surrounding area gently rolling hills covered with lawn like growth Buckwheat & Bgn., about 2-3" tall, with little space between stolts. Small amt. mid-grasses present (A.sor + another), but only about 1%, & many seed stalks (8") of these cut. Mid grasses dry, shot grasses drying, so expect yellow- green. Burrows most numerous in rounded drawn & bases of hills. Few burrows on slopes >60% grade. Boulders protruded