Koford Cynomys ludovicianus May 21, 1955 Medora, N. Dakota ents of Patterson transects in this town, now a ghost town). // Visited the Johnson Platoon colony. This are thriving last summer. A formerly ploughed area at edge colony had had many dogs & had been poisoned in 1953; the poisoning had had almost no effect, but had apparently killed some dogs. For Nassauvum, now five dogs. Old ploughed area had been reseeded this year. On areas of hillsides where no dogs now, large areas of a lawn fall about 5" high (Cirgum caudosum). Many boulder diggings here. Castia patens fine, but apparently not eaten. Agropyron, Bantelova, & Carex present, // Transects: Then first run last year. Method is a 10 meter belt 1 cm. wide. Species in each cm. counted 1, except single stalked that are counted ½. Foliage cover from above taken, not root crown. Four lines set out in 4 cardinal directions, starting 3' from a burrow. Veg- tation heterogeneous, sodline covers great difference. // In this area grazing pressure causes Bantelova gracilis to increase, Agropyron to decrease. Stipa canata soon goes out under grazing. Carex filifolia present & considered good grazing, green early & late, & least to disappear under grazing pressure. Can get grazing slopes from 5 C S in Dickinson. // Put out new set of 4 transects on steeper slope of Beef Corral town (about 3½-4% slope). Approximately same species here as in Lower Canyon town. Much activity in this large Beef Corral town. No favorites definitely seen. (Antennia frigida increases under grazing pressure, Better agree that C.L. probably cause of keeping down Antennia longifolia (= care?) On slopes at head of town, Stipa canata canna (less grazing), Andropogen scoparius, & Calamovilfa (sand redgras; coarse).