Greene, H. 1992 August 13 (continued) from under the boulders in front of (>1m) where they were yesterday. At 8027h we saw a Neonfa run (not fast) across the road at the pull-out. at 0848h C. molossus ♂13 under a rock and Opuntia patch at the top of a cliff 30m N. Pole 2 and ≥350m NW of yesterday's site, in a nesty or henty coil. Met John Georis (Philadelphia Zoo) and his girlfriend, who told us they saw a Nasua in this canyon last week. At 0927h we found the sign of C. molossus ♀12 in ≈ same site but couldn't see her. At 0927h. C. molossus ♀15 was coiled tight in exactly the same place where I spotted her late afternoon of August 12th. at 0934h C. molossus ♂9 is ≈100m N. of the road, stretched immobile, and rattled when I approached to 1.5m - I had already walked by him once - he is ≥200m W of yesterday's site. At 0949h C. molossus ♀6 is on the W. (opposite) side of her big ravine, emerging from a hole into which she withdrew. I approached to 2m. At 1017h C. molossus ♂11 is in a henty/nesty coil under the edge of an Opuntia ≈20m N. of the road. August 14 Sunny. At 0816h the signals of C. molossus ♂♂17 were at the same site, snakes not visible. At 0817h I spotted C. molossus ♀ at the exact site as yesterday. At 0833h we found C. molossus ♂9 at the base of rock in a henty coil. At 0904h we found the signal of C. molossus ♀12 at the same boulder