RIBBLE, D.O. 1986 30 Journal Russell Reservation, Contra Costa Co., CA July (12 local) facing slopes ( Baccharis spp), and various combinations of chaparral & woodland mix. The valley floor consists of pine trees planted for genetic studies. Today was clear and warm (upper 80s) with a slight breeze. We set up 5 traplines, 10 stations at each, 2 traps/station, 10-15m between stations, baited w/ rolled oats. Trapline I - 300m N/W of the observatory. Bay-Oak woodland bordered by grassland and soft chaparral. Slope faces to the southwest. Not much ground cover vegetation and fairly sparse. Found a few Neotoma midden plus scat. Trapline II - starts at end of valley road and heads up north east on south facing arroyo. Chaparral dominated by Baccharis and Salvia spp, with one Quercus. The transect runs up for 8 stations and #9 & 10 are at the bottom. Trapline III - start at east end of valley road and continues east up the arroyo. Oak-Bay woodland w/ dense floor cover of Rubes, poison oak and blackberry. Very sparse. Traps run up the arroyo for 8 stations and cuts back to the the southwest along the arroyo slope. Trapline IV - Starts ~0.4 mi east of office on south side of valley floor in chaparral oak woodland. Runs along the edge of the chaparral-pine edge and then goes up into (U-1) the chaparral. The chaparral is very dense with Baccharis, some bay trees, poison oak, and wild rose. Trapline V - starts same place as IV, but runs up through chaparral to grassland-chaparral edge & follows along edge the last 5 stations. Finished setting traps by 61700h (Pacific daylight savings time)