Greene, H. 1992 September 16 (continued) Smokey Blue green agaves. At the first shaft we suddenly encountered a wash of cool, clammy air when we dropped into the vegetated trench above the failing, and the smell of guano. During tasks in late afternoon sun, we found a juvenile Thamnophis cystopsi (1702hr) cloacal discharge & flash, no biting) and a neonote Pituophis melanoleucus (1709 hr.) tail wilzate, hiss, stikes) backin on the dirt road. At 1806hr, after I walked up x 1 km through brush, we found L. molossus F # 15 +/- 20 m S of the road and >= 100 m E of the large road to the S & on the SW edge of the curve at the E. boundary of our main study area - she was crawling near the base of a juniper on open ground, and rattled at me briefly then coiled as we approached to x 2 m w/out first seeing her. September 17 Drove to Tucson and returned to Berkeley. Barney Torberlin gave me a Masticophis flagellum from Douglas, which showed up on the airport security X-ray in my jacket - fortunately the American West supervisor let me on anyway! September 21 Sarah Schmidt told me by phone that at x 1930hr tonight, after dark, she saw 2 Urocyon cross the road in our S study area - another potential predator on Crotalus molossus.