Greene, H. 1983 26 June (continued) an adult ? Smileia (underlined) bandirini on a twig ~2m up. Michael Fozder found a Nothopsis (underlined) nigrosus crossing a trail in the dark. When handled, it alternates thrashing and becoming rigid. One dorsal discharge of clear liquid, of which I could detect no odor. 27 June Watched Lachesis off and on throughout day and evening. Rained most of day and into the night, sometimes very hard, and there was a tremendous wind storm ~1700h. Later I noticed many limbs and branches down in the forest. When I checked the lachesis at night it's neck was in an S-coil and head was up - "alert," perhaps coincidentally, as I reached the place on the CES trail as it turned into the forest, some rat-sized rodent crossed the trail. Only other time I saw the lachesis seem alert was on a rainy night when I also flushed a rodent or a log very near it. 28 June Checked Lachesis throughout day. After lunch walked around the Arboretum, and at 1404h on the shortcut from the Susa Trail just inside forest from the Lab Clearing I spied a Tarodon (underlined) sabdocephalus crawling rapidly off the trail. I thought it was a Bothrops (underlined) asper and nearly lost it in a tree hole before, on the third stab, I pinned it,