Roford Cynomys ludovicianus December 28/1954. Mr. Nunn, Colorado. Many jack & cottontail rabbit tracks in snow. Cottontails are numerous, tracks clearly showed. Brief examination discovered no C.L. out (30° temp. + visible 1" snow on ground). Bluffs to north similar to those near Brown, said Klipple. This might be our good area for study as range condition well known. No winter grazing here now although this is common practice in region. Cattle will be put on in May, when new growth sufficient. This range contains various grazing exclosures & a rabbit exclosure. At Ft. Collins talked with Dr. Love, in charge of Front Range Research Center. He said this was a colony (Gunnisoni) of prairie dogs on the Manitou experimental area near Colorado Springs. He thought there were probably a relationship between overgrazing and C.L. abundance. December 29, 1954. Ft. Collins, Colo. Visited Mason, supervisor of Roosevelt National Forest. He said that the [illegible] wounds that I saw in Buckhorn Canyon (Mr. cant. T 7N, R 71W) were invasive this year. He had shot C.L. Cynomys these on occasion. He had also shot navy, this year, near the Larannie River (in SE part T 11N, R 77W). There black-tailed, he said, & near 8000 ft. altitude. Mason said that the C.C. had poisoned much prairie dog area when in operation. Long ago, he said, one could see prairie dogs everywhere. He thought that near Pueblo used to