Koford 309 Cynomys ludovicianus October 19, 1955 Nw Weld Co., GLO. ent. Bee Burrows in bottom of about 5% slope between hills 100-200 yds. apart. Brgs dominant. Ground cover 25%. Trace of Asm, Chrysotomum (8" tall), Shea, Opuntia 2%, Criocymum, Sphandus, Applepoppin, Munroa, Aster, Antennaria. Brgs substitutes conspicuous in irregular areas, to 16" tall. Sewer at burrow in fill over gas line, the only 2' wide, suggesting that bare ground where broken ground forced for burrowing. This fill also lined with Shea (summer food). Soil tephrite medium (red, to light on most of Terry Pond). A line of telephone poles thru area. One near center burrow area had 50+ splats whitewash on ground, a few eagle feathers, & a large cast (collected); good hawk perch. 1/ Much of range of W.L.S. Co. in Brgs in bunchgrass form, not appearing overgrazed. For sheep, Asm & Stipa not highly desirable. Nr. Ft. Collins, GLO. October 20, 1955 With Dr. Bridleman & his vertebrate ecology class visited Spring Canyon dam colony, Mr. F.C. Goodell, owner of pond at N. end, says C.L. there 20 yrs. to his knowledge. Water in lake until 4 yrs. ago. Then water table dropped; now about 28 feet. In morning at 9 a.m. I saw 6 C.L. to N. of fence, 4 to 5. Most on Bda areas. Well scattered over mapped area. 1/ Class dug at 2 burrows. One water burrow went down at 45° angle to 21" deep, then dropped vertically about 2 feet, then turned toward horizontal. Topsoil was about 20" deep; then gravelly layer & hard dry clay below. This burrow near no. 8. Another dug in edge