Koford 188 Cynomys ludovicianus July 17, 1955 Niobrara Co., Wyoming 23 oats on ground indicated recent poisoning, but I saw 15 dogs out on estimated 4 acres, 4 several near bottom. Their primarily sheep posture, as shown by troche & droppings, at head (S. end) A710 (filifolia?) of long 370 slope, mainly C. L., but Bait. gracilis mixed with ( + much Plantago spindulosa ) further halfway down slope, & much in bottom. Patches Buchloe absin better. On break in slope (steeper) near bottom, open stood Aby Artemisia tribulata. C.L. had apparently cut many shoots of this, a few lupine plants cropped low, but no tops present so maybe not C.L. I found one dead C.L. atop ground. Both melted except malt incomplete in shoulder region. Much open ground 50% bare. between grass & sedge tufts. Dirt loam soil, On mica. Solenium trifidum, Sphaeralcea, & other familiar plants. In thickest grass in bottom, no C.L. wounds or sign. Some Ag. spp. present, & some Stipa comata. Main slope of colony about 5%, N aspect. One low crest was a few burrows. One had tufts of Stipa co. persisting on mound. Should photo this next trip. Much low Opuntia on this colony, but no evidence recent feeding on it found. Some Agropyra (sp.) & another mid-grass present. July 19, 1955 CPER, Weld Co., Co.10. Arrived 12 M. at CPER Sec. 22 colony. Clear, dry, 20 mph S. wind. From W. end colony I saw 4 N. of fence at W. end, 22 in 10x10 chew sector 10-20 w., O to 10±5. Much Solenium cut throughout colony, & for 50's. of southeasterly new burrows (10-20w, 10-12 S.). W. splay more clearly shown that it is C.L. that cut Solenium. Barely one 10" tall in cattle splay, many slabs over 20" tall inside splay (photographed). One new burrow about 25' NW of 30 w., ± N., with much grass sod scratched into mound. In that area, much Agro cut its