Suite, Blair. 1973 Journal July 24 9 mi. SW Austin, Lander Co., Nev. Arrived on trap site at 6:00 AM. It was quite cold, 50°F or less. In the 50 traps we set we got 4 Ripidolus ardii, 2 Perognathus sp., and 1 Microdipodops megacephalus. The kangaroo mice were torpid, but seed was left in the trap. Three of the D. ardi was taken from a single burrow complex. This re-confirms the association of dipos with burrows of the appropriate size. Of the 3, one was a juvenile. It seems that D. ardi is found in montana sage isolates, but that D. microps is not. 2 mi. W. Railroad Pass, Lander Co., Nev. We drove a short distance south west on SR 2 to Railroad pass, then took a dirt road that headed due west into Smith's Creek Valley at 2 mi. W. Railroad pass. The road cut over a dune complex 100 yds wide at most and 250 yds long. Here burrows were abundant, so we set 74 traps out. The remaining 27 traps were set at the edge of the smaller dry lake, about 400 yds north of the road (see map). On the way to