Koford 261 Cynomys ludovicianus September 14, 1955 (PER Weld G, G10. Asm generally green. Bottom of Bgr green, 4 at least 3 C.b. seen feeding there. Much cut Bgr seedstalks in + at edges colony, + for- spiciously more of them outside colony area. No expansion, tho possibly some new burrows dug within limits old burrows during last month. I dropped limits old burrows + put in all recent found from vicinity 00N 20W to 00W 20S. An open rain upslope in much of this area, but most these recent per- ipheral burrows not currently used. No recent cutting of Salsola noted. Some growing 1ft. high adjacent to mounds. I saw a coyote run from Cotton at N.Word colony at 9:30 a.m. (eas- ily drinking thine). Saw Salsola, Eriogonum, Chrysothamnus, Aster tenacet., Applepoppies. No sign in area I saw near 245. I set 5 traps to E.of N-5fence at E.end; saw 4 C.b. in area II. Much succulent Patulaca still present. One burrow appear- cently dug out by Tapidae in CA. I made overlay maps with notes + location recent burrows. Several appearance of dog area is short grass without Bgr seeds to the + no continium area Slea. She may be barriers to spread, or no recent burrows measured where continium. She (thinner earlier). II Visited area of colony a Orange ranch that was paired last year. No prairie dogs left; the same burrows seem to have been used by smaller rod- dents. Areas as 4 around many old mounds show conspicuous green area, mostly of Salsola 2' tall, on 4 for a few feet around them. In mound areas are Slea, Chrysothamnus (3' tall), Ant. frij., Sphaeralcea, Asm, Chenop. album, Polygonum, Aster, Scebromedus, Plantago (purbii). Large Slea plant often grows in mouth old burrow. Slea region around edge