Papa Leon Tree, 150 +/- ft., Depto. Lima, Peru purpose of this is to compare catches and get data on breeding and age. Tonight I put up my first trid, as a saltator albicollis ? (MAL 147). Dr. Davis caught 3 in a net and left them at an doorstep. July 16 (cont.) Checked our traps this morning. All together in the Callow line I caught 25 mice and 2 tails. At 4 stations all three traps had mice. 23 of the mice were Mus, and 2 were Oryzomys xanthodes (MAL 171, 172). Most of the specimens were eaten partly by ants or other mice. A couple of the traps had the string chewed through, and at 2 stations all three traps were sprung and empty. Ray caught 3 Phyllotis auncius and 1 Mus in the 40 sherman he put out along the beach. We went to the study area where we continued sampling macro pivertebrate under Jellandrea. Ray and I came back, I took reproductive data, measurements, and skull onlys from the Mus, put up the 2 Oryzomys. Then we put up & the 3 P. auncius and told their chromosomes. The live Mus will be used for feeding experiments. The 3 Pearsons spent the day at the study area. At 3:30 I dropped Ray off at the beach near the cliffs so he could set 40 live traps again. I then went to my Callow line to check it and submit. On the way out (I was to pick up the Pearsons, then