Freare, H. 1990 June 18 La Selva Biological Station, Heredia Province, Costa Rica Arrived here @ 0945 hr via the highway through Braulio Carillo National Park. Managed to catch my plane out of San Francisco yesterday AM despite an airport van driver who was still lost in the Oakland hills 45 min before flight time. Met at the airport by Alejandro Solerzano, Sergio Miranda (co-owners of the Serpantario in San Jose), and John Cable (ANSP here to collect for a month), and spent the night at Hotel Galicia. Billie and David Hardy from Tucson had arrived at La Selva on the 15th to work together for two weeks, and Wendy Roberto (one of my graduate students) had arrived here in late May. Everyone is saying that snakes have been scarce lately. As I walked to the River Station for the first time after lunch, at 1356 hr I saw a neonate Micrurus nigrocinctus (186+20 mm, 1.8g) crawling rapidly on the sidewalk. Snake appeared at first glance brightly ringed. When I seized it with a plastic bag the snake thrashed wildly (no oval separate tail display) and bit by swiveling its head to the side and holding the plastic bag in its jaws. Dave Hardy and I went to a tree where he located the radio signal at 151.270 MHz, a transmitter I implanted in a ~2m Bothrops asper. Snake is obviously somewhere under the tree (a Pentaclethra?) and there are two or three possible burrow entrances. Dave checked again after dark, but as yet we've