Chero, H. 1984 18 June (continued) at 1600h we saw her emerge into the open from alongside a fallen log, with ≈ ant. ⅓ of body showing new skin. She continued crawling, at times listing sharply a part or most of her body to (?) rub a particular portion. By ≈ 1640h she reached the buttresses of a huge Ceiba free, crawled partly into one space, then against the buttress, out, and into the restree. At each of two buttress walls she applied the anterior part of her body flat against the wood, then crawled the rest through that stretch, still rubbing. After the second buttress, she turned out into the forest, crawling along under a patch of small palms. I was repeatedly impressed by two aspects of skin control: "sipping" at the side of new-old skin separation, and rolling of parts of her body to rub the dorsum on the ground. At times ½ or more of the yellow webster was showing. at ≈ 1716h I stepped from behind a Ceiba root; she apparently sensed me, and crawled rapidly ≈ 2 body lengths away. We left. Returned with Dave, Manuel, and Richard ≈ 2050h. Got signal in same general area, but it took us ≥ 45 minutes until Manuel saw her coiled w/ head up at an angle under a fallen, partly crumpled brown Welvia frond. W/in 1 min of us putting the light on her she