Hosts: Sean 0605 Journal Breckenman lava flows and Merrill Creek, Eagle Lake area, Lassen National Forest, Lassen Co, CA June 20 Chad and I drove north on Al (Eagle Lake Rd.) to the Breckenman lava flows where the mammal survey team had trapped earlier. We drove down the dirt road to Breckenman lava flow until it became too muddy and then parked and began to search at 9:15. The area had ridges formed by lava rocks with sparse vegetation interspersed with sandy scrub/brush areas with juniper, a few pines and some shrubs. We saw many Xalopurus occidentalis on the lava rocks, and many D. gracilis on the rocks and on the sandy soil. The D. gracilis seemed to stay nearer to vegetation while the D. occidentalis were more on top of large rocks or in crevices. I caught two of each species and Chad caught 1 of each (CMM12-17) between 9:15 and 11:45. We did not see any other horps at this site (40.58621°N, 120.84012°W [WGS84, 10m acc.], 1555m elev.). We drove south and stopped at a small, rather stagnant muddy pond with sparse vegetation at the entrance to Christle Campground. (40.56727°N, 120.83918°W [WGS84, 10m acc.], 1566m elev.) CMM18+19 We quickly collected 2 R. dequilla juveniles and one T. elegans (CMM 20). We then drove south to Merrill Creek, drove ~100m W up a dirt road and began to survey at 12:20. I quickly found a D. gracilis along the creek (CMM21) and Chad caught another (CMM22). (40.54576°N, 120.80999°W [WGS84, 11m acc.], 1579m elev.). We searched up a branch of the creek that opened up into a large meadow, but found nothing and stopped looking at 13:15. We went back to camp and propped specimens. Jim McCluskie and Craig Morty arrived in the evening; Craig and I went night driving around the lake but saw only 1 BOR Colder.