The damp-sand crust at 8:30 a.m. was 1/2 to 3/4 inches thick. 18 drops from the test pipette = 1 ml. 70 drops = 3.9 ml. Very large rat tracks went at least 50 yds across area. The 48 small traps on the grid caught 3 mice, one of them will turn it over. The two set by rocks on the north slope caught 2 more mice. 4 of the 5 were still alive, hence indigestible stomach contents. Nothing near the 3 foot sets. Moth-min on area on July 28 at 6 p.m. after several days 55°-70°. Moth-min July 29 at 9 a.m. 53°-x. No rain in gauge. To circumvent gross changes in weight due to garbage, humidity changes, etc., use today's sample of live and dead Tillandsia, weighed fresh (and somewhat soggy) and to be dried and re-weighed as a reference, then convert the garden plant weights to dry weight. Today's weights followed the first reasonably wet night in 2 weeks - at least night that we have been in residence. at 5 p.m. put up two lot nets at the north end of the Puerto Viejo beach (7km SSE Chilea, 2 km) stretching between clefts in rocky stocks. At dusk small bats started flying and we promptly netted two, one of which escaped. Ante set some traps for rats? among sea cave & cliffs, and Carol set some museum specials across the road from our study area. I left my 3 foot traps out. A skunk dropping from the lower east of Pico Seco contained scorpion, Orygopus, and Phylloste. We caught a single Orygopus here in one night & trapping July 30 With 80 swops of 12" mice set at 6:45 a.m. calm; nothing 100 " " " " " " " : " 50 " " " " " " 7:00 a.m. " : "