Koford 193 Cynomys ludovicianus August 29, 1955 Nr. Cache, Oklahoma Aman, Sal. north. An occasional old burn to 150 yds. E. of fence, where much Bda, + old wallow grown over, but used burrows only (GE. of) E. to 100 yds. from fence; Bae + Age mixed in Andropogon areas. Bda- Aea about 50/50, + Aristida in C.L. area. Apparently invade Aea if shot, even though coarse bare ground. Population low in E. area, many unused peripheral burrows. Irregular distribution with tall Andropogon (to 12" leaves, 2' stalks), + Bae between. Aea dominant; Aea, Age present. Aristida common both E. & W. of fence, the grazing pressure different (due to some C.L. mainly?). Arist. to 100' from currently used burrows. Opuntia humifusa present. No current use in near pure Aristida, the somewhat old burrows opened. || C.L. Java Bda. Begin Java Bda areas. C.L. make habitat favorable for burial, vice versa? Around isolated abandoned burrows is for a burrow said foot Bda; cause or effect? || Knall at N. side of main part colony surrounded by Aea, Age, Bae, Aea, & some Brindelia, Lutetinergia; this area, 10-70 slope, gently with no C.L. In NW sector, many bur- rows on flattish ground toward Turkey Creek. This sector separated from main part town by isthmus of Andropogon with some openings made by C.L. Small swales a few feet wide run into C.L. area down slope from in Andropogon. Grass cut shorter in these swales, & C.L. burrows in some to 75 yds. from main Bda area, t. Bda outside up then swale further than in adjacent area (no dense Bda with above Andropogon between). These swales there may be caused by or may favor C.L. In this area Bda edge sharp against taller Andropogon on upslope side (no Aristida area). Apparently breeches in uniformity of Andropogon favor C.L.-grazing, can trample, ant nests, wallow, swales. C.L. tend to be