Koford 273 Cynomys ludovicianus September 22, 1955 Wind Cave Nati'l Park, S. Dakota (insulating) Dry grass except where blown to Bda area (some bare paths 3-4" wide thru this grass between burnours. || To N.E. a group of about 5 burn. atytone perishing in abandoned, but a group 50 yds. shot of them being used now. C.l. characteristically in area Bda, surrounded by Aem, then Bja. There are scattered sites like this not yet occupied by C.l. || On a circular area of about 1A (at head of draw leading SE) about 250 yds. ENE of dam, I saw count- ed 15 C.l. alarmed, as many as 5 now to some mds. & stood. Feeding seen to be mainly at upslope edge of area. Some small Still. Area had Bda cover about 90%; Bja & Aem 5%; forbs 5% (green Arctep, prunula with hood; Solidago grisea; dry Medeuma & Plantago purshii). On mds: Arctep. prun., Solidago, Verbena bract., Poly. avic. || On area oldest part along near dam, from 5-15/A. No general decrease there (some possibly low spots). Two fed in green bottom above dam. || A Sylvilogen seen 3' from a C.l; both quiet, on one mound. || Near road W. of dam I saw diggings to 4" deep among Aem roots. One site had buff-eatin potatos-like root about 2/4". diam. (sourd-potato smell) [not Prion, ten., or Sphaerula). September 23, 1955 Wind Cave N.P., S. Dakota. Cold night. Sunrise about 6 a.m. No C.l. out by 6:30 in Wards A,B C. of Shertail Canyon. Ward B - large areas dry Dpa, papp., Nek. Hisp., Chenop. lept., &c. Plantago purshii, Aristida bilt at N4 S. edges of area. At 8 a.m. I saw 2 out in E. 1/4 of ward, at edge Dpa zone. || Counted 13 on Ward A 8:10 a.m., 4 at one mound, apparently jires, + 2 apparent jires. another nd. Evidently an influx of jires since July. N.I. of old Ward A a slab striking break from shot grass to tall Bja at N. edge. Dyspodiia papp., red bran transpiuous, 6"-8" tall, dominant over much of old ward A but little in afterd area to W & S.W., but old area flatter so maybe soilor