Koford 192 (cont. from Botton p.189) Cynomys ludovicianus July 23, 1955 Custer, S. Dakota. Headquarters. The letter claimed to have compiled records of ferrets similar to those published by Cahalane (Your. Mamm., 1954). Both said that 7 mi. NW of Kadoka, on Bill Norton place, once a small colony dogs with a ferret. The ferret was said by Norton to have cleaned out the dogs. Barnes said still about a section of C.L. in Badlands Nat'l Monument in Dogs Creek area, N. side of pass. In this region a large town that would be poisoned was E. of Vermorso, 17 miles on N. flk. of road, on John Reed place. In a few days a small one 3 mi. N. of Fairs- born would be poisoned (Williams). Harold said that tomato acid con- taining plants sometimes caused failure of strychnine poisoning of rodents (antidote) thus "interference." Few prairie dogs left in this region now (poisoning is "cleanup work"), but more in Pennington Co. Harold had worked about 10 yrs. in "control" in this state. He said he had not noticed any diminished effect of poison on prairie dogs. Both men very friendly, but inclined to be over authoritative (said there were 2 kinds burrowing aule, for example). Mr. Klipple said many weeds at CPER this year. This characteristic of wet year following a dry one. How does increase weeds affect C.L.? = more food? or more obstacles to cut. Idea: get C. Hart Merriam notes for Llano Estacado prairie dogs, for evaluation (Zoophyloch Aqn., 1901). Have ferret stomachs been exam- ined? What contained? Wind Cave N.P., Hot Springs, S. Dak. (no jaws) July 24, 1955 Skittail Canyon. Onward B at least 6 dogs probably 7, 2 being at far W end, 2 at E. end, 4-3 near middle. I watched one eating Hedysoma bigelovii. Cut at base a pulled up with teeth, then held Plant + site from base, about 1/2 plant eaten. Seeds very tiny. Only a nearly so now, it's second, 1 after the other. In that area much Cheesepodium, leptophyllum, etc. & drying & same there much offered B, where C.L.,