Koford Cynomy s ludovicianus March 27,1955 CPER weld 6, G.I.F. apts (sobarn ground), heavy one Opuntia at 3 sites (took photo), parts of Salsola cut off & scattered on about 2" from burrow; one burrow used the snow entirely did mound. (hole in snow photos). Trochis upslope to N., to within 10 yds. of fence. No trocha over 10 yds. outside after burrow. Some burrows within boundary & many (mostly shallow) outside of boundary show no use (peripheral burrows shallow & not permanent at first?). No signs of building mounds or new burrows. No green foals or grass apparent. A plant of Astragalus mollissimus (?) with 4" leaves from close burrow but not eaten, 30 yds. apart. C.F. One saw law hill about 100 yds. W. of these burrows, 2 used & many trocha, I saw 3 or 4 at one of these upon arrival. Evident feeding on green Opuntia & scratching up of bases dry grass (Buckles?). One flat area packed ground area in bottom, 2 holes open apparently used by Sylindrus; another group 2-20 yds. apart about 200 yds. S.E. of fence on W. side stream bed had Trochis & chewed opuntia leaf, green. Another group of 3, 15 yds. apart, 1 on the flattened bottom with slight mound (1/2" to slope?), others up steeper slope. 9 are apparent old shallow burrows on slope than any used. Spacing for for most part, I think oldest part colony on N. side streamed about 100 yds. W. of E. fence. line - down spacing. One burrow had 6" long 4" diam. Chrysothamnus shrub base in mouth & 4" long central stalk Salsola with stolons of tender Salsola used for nest material? On 3, inds streamed mean E. and colony, 3 burrows used. One with 7/4" diam. Cloths dug out or if by lodge or Lepus. To E. of E. fence, 3 burrows showed activity. Farthest E. on 598 S.- facing slope & had many trocha; Opuntia eaten & broken at 3 sites within 20' of burrow. Same eastern burrows as earlier found used. Some 2"x2" pricres green Opuntia broken off. I saw 3 flies, 3 tiny grasshopper nymphs, 10% antelope 1/4 mile S. of E. and colony. Last E. burrow 35 yds. from nest N-S used one, 6-100 yds. from fence. One only 10 yds. E. fence. All E. of fence