Koford 314 Cynomys ludovicianus November 4, 1955. Washington D.C. region contains by far the most extensive population of prairie dogs that I have ever found." A 1918 note of V.B. censuring same region says dogs about 10% of farmers, due poisoning mainly. [illegible] Kellogg says that (in early 1900's?) in Travis Co., Kansas, he saw prairie dogs filling up a bunker after a rattlesnake entered it. November 5, 1955. Patuxent, Md. Dr. filed in "Mensium Bldg.", a card for food habits of Butis lagopus, Sept. 30, 1913, examined by C.R. Kalmi from New Mexico; stomach cont. 85% remains of Cyn- omyes. (In gird Butis lagopus feeds on rabbits + Peromys- cus). For Falco mexicanus, Oct. 2, 1913, E.R. Kalmi Kochs, 75% Cynomys in one stomach; Kochler, New Mex. Food of Tachida tatora. Cynomys in stomachs of 3, New Mexico, Sept. 1904, dug V. Bailey - also one (C. leucurus) from Bitter Creek, Wyo., Sept. 16, 1893; V. Bailey. / No stomach exam. finite line at Patuxent. / Rattle- snake (Crot. atrop?) - 18 examined by Bird. Denney included 2 with prairie dog remains stomach; 1 with p.d. & cottontail; 4 with apermophiles (note by Lantz). Nov. 4, 1955 Washington, D.C. Visited Doris Green & Clifford Prentall at headquarters of predator rodent control deer. They gave me recent sheet on broad policy. They said present policy for prairie dogs is to control only when there is complaint, not to exterminate. Told them of general scope of my project.