Greene, H. 1990 March 28 fruit in the Cecropia tree on the S. side of the (continued) bridge, from which I observed the sloth fight in 1987. Forgot to mention that at x 1500m a tourist spotted the bright yellow throat of a Pseustes pselodotes pictusis from the eves of the Old River Station. It was x1.2m TL, no food in stomach, and slightly inflated the throat only under repeated threats. Otherwise just rapid crawling. March 29 This morning I handled the Erylius after it had been out of the air conditioned lab >12hrs, thus presumably at normal temperatures. This snake responds to being seized by rapid locomotion and squeezing, and repeatedly wraps up to three loops of its long tail around my fingers. While the tail is thus applied, its spine tip makes "poking" movements against the fingers. When seized firmly by the tail it spun violently and broke off 1 1/2, which I dropped and fined. There was no obvious blood on the snake or tail piece. It flipped rapidly (>1/second) and symmetrically in a sinusous repeaty pattern like I observed last year for Urttcea euryzona. It moved a few cm at first, but not thereafter in space, and changed side up at least 4 times displaying white or black. By 1'30" the tail was slowly and tendry to coil in a knot. At 3'10" it stop in a tight spiral and moves slowly when pinched. At5'20" coils if uncoiled but otherwise immobile. at 6'18" still moves slightly. at 16'30" and 21'00" the tail still moves slowly if pinched, and contracts to a knot like coil.