Koford Cynomys ludovicianus April 16, 1955 NW Weld Co., Colo. m.p.h. wind, || Drove to CPER. Finished setting up 2 10'x10' explorers for C.L., one at each new colony. Photod E. one. Some grass to 2" tall & green now. This is first appreciable grass found away from water. Snow in bottom has melted to pools of water. Saw one Lito stenolurina - first seen here. April 19, 1955 W. F.T. Collins, Colo. At 9 a.m. of sunny warm day arrived Spring Campa Dam colony & saw 12 C.L. ant. Two at burrow 50' N of #7, on dry pond bed; one at #10, one 100'S E of #11; there 4 only near N. of fence: 3 of fence: 2, 50'S. of #16; 2, 50 yds. S. of #16; 1, 50'N. of #13; 1, 50'S. of #13; 1, 50 yds. SE of #3; 1, 10'N. of #18. Population will scatland, not diminished, apparently. Not seen in NW part. Many lurneaus shoud scratching out of loose dirt but little other seen. #11 had colured one month. || Beatified blader grass (Stipa?) to 4" tall here now. Annual species forbs growing. Cogswellia locus to 5"; some with flower heads now. An overall green aspect from a distance. Set 5 still traps on mouse near where C.L. seen. Departed 10 a.m. || Visited colony between what fields on Foril Creek, 3 ½ Ser. 4. Few dogs out, compared to pre- vious visit about April 1. Scattered blader grass to 4" tall, several forbs growing. Chrysothamnus 3' tall here. Many lurneaus in the wheat fields. Mostly in those not ploughed & sowed this year, but 6 at on slope ploughed since about April 1. Photod some of few C.L. seats present but possibly Sylvilagus occupies. (East) Even closely cropped. Not Buckle but lund grows. On hillside slopes fewer to W., in SW corner Ser. 7, mostly Bruchloe, little new grass, a few C.L., many old lurneaus. || In Sec. 3, to E. of road here, blown grazing, 3 horses present. Saw several & shot a