Koford Cynomys ludovicianus August 9, 1955 (CPER, Weld G., Colo.) Sloper with swales, but [illegible] apparently old part colony has more weeds (Cyntraena prominent, but also N. of fence where no C.L.). Photographed 100' transect area. Nw Wellington, Larimer Co., Colo. August 11, 1955. At Wellington, horse pasture colony (now no horses) weeds, especially Kochia scoparia & Salsola kali, have increased in abundance & height during summer. The north-central third of area has weeds (Sida naihy) widespread, with many groups open a few feet across, & most C.L. now in this area. In most of the other sites where burnour weeds relatively low & sparse. It may be that burnour made due because of sparsity, weeds at seen of spread of dogs, not because of effect dogs. Dogs mostly on high or dryin ground. Made overlay map of general vegetation. Practically no grass (less than 1% Baca; much more dead Baca) except Distichlis stricta & Sitanion hystrix. Little No sign activity in most areas, fewer Kochia where many new plants, but much cutting at bordering area & isolated weeds. About 14 C.L., seen; all but 5 being in N-central third colony. No hypsopryin in area of colony over earlier this year, but some new burn- ours within occupied area. Burnour used to near extremes of former size (apparently not the SW-most one & NE-most one. Field to S. of colony ploughed a few weeks ago; no new greenery thus yet. Old burnour reopened to 15 yds into ploughed ground. No reap- and burnour S. of in ploughed ground S. of area E of 00 pt. at fence. Some Spergula spp. (not jow.) but perhaps 2 only. In area of Koe, some digging, to 3" deep (for ? mice?). Some new burnours in area where Koe 12-18" tall left with spawn less grounds 2-3' diam., much cut Koe around there in irregular manner, to distance 5