Koford 125 Cynomy s ludovicianus May 25, 1955 TRNMP, Medora, S. Dak, low productivity & high mortality plus good food supply on present area makes superabundance unnecessary. Disappearance of dogs might be due to poor production of young or survival of juveniles in 1953, so they not produce young in '54. Thus, much of 2 age classes missing, & these might make up large part of population. Rain today. I drove S. to Wind Cave N'Park. May 26, 1955 Nr. Ft. Collins, Colorado. Visited Spring Can. Dam colony. Saw at least 9 groups c.l., & two groups of 3 juveniles. Made overlay of maps, showing locations. Area occupied has not expanded - shot of greatest extent to S. & to NW. Scratchings & diggings clearly show where recent activity. Nearly all burrows where I had trapped showed evid. activity - not #24,21, 26, 29, or 30, however. On transect line Agropyron smithii, Salalola, Spharalesia now present, in addition to Bunches. Las Ag.spp. (about 4" tall) sprinkled our area, thicker of tallin in bottom draws. Some Spharalesia in bloom, Cristidurum, but 6" high near #19, 4 green, with seed heads. Several burrows about 6" deep in old mounds that had no hole. Scratchings to 6' around many mounds. Then the generally bare ground but leave Spharalesia & Salalola. No animals seen on slope above 570 at E. side. (a few Viola mittali in area). Near #15 a newly dug out burrow (in older hole) under 1 x 1½ ft. boulder. More Salalola N. of fence than S. in dry led pad, outer part, gentle slope, little growing but Salalola 2" high. Several burrows newly opened there. Two Chrysothamnus lances 6" high 1½' diam., located 5 yds. from hole #23, had 2" cut from tops; many branches. Several 5" stalks Ant. frig. also cut from some twigs. No sure sign activity at