Pearson-1989 22 Clemente Onelli where I had traps around 4 other Stillingia bushes and two in a tuco burrow (the one where I caught the tuco yesterday). This trap line contained one lizard (Liolaemus). Then picked up the traps under the owl cliff. This line contained 7 cage traps, 8 Shermans, and 9 steel traps, all baited with gopher meat. Two of them were sprung, but no catch. Total 50 traps. Hence in 2 nights, 122 trap nights, caught 2 Phyllotis, 1 tuco, and 1 lizard. Altitude reading here was 3044 ft. Altitude at Comallo Arriba at the school was 2850 ft. Stopped to take pictures at the school. While there, a local rancher stopped, Hugo Alberto. His chacra is 5km up the Comallo Valley. He raises alfalfa, sheep. says this old school was abandoned about 1972. There was a big, active, leaf cutter ant nest in theg'school yard. The railroad comes down the Comallo Valley here and meets the road near the school. November 8.- Bariloche. Did owl pellets and bamboo data. Lots of Lestodelphys in the pellets. Weather clear, cool, windy. Contents of the owl pellets from 9km W Clemente Onelli Ctenomys 36 Phyllotis 20 Reithrodon 38 Buneomys chinchilloides 13 Bligmodontia 33 Abrothrix 9 Akodon xantho. 29 Bird 2 Lestodelphys 20 Akodon iniscatus? 1 201 Note 10% Lestodelphys, range extension of Abrothrix, Absence of Auliscomys, and presence maybe of Akodon iniscatus. The Species Diversity Index is also notably high. November 9- Bariloche. Weather sunny, cool, windy. Owl pellets and bamboo data. Then drove out to Cerro Leones and set traps on the east side of the road to Pilca in the area that was bulldozed for roads and real estate development 2 years ago. The vegetation seems to be much less grazed than the slope up to the owl cliff on Cerro Leones itself. Lots of hare droppings plus some horse droppings. There is much more bunchgrass here, some of it with seed heads. Set 34 Shermans and 34 Museum Specials at 8 pm. Through steppe of mixed bunchgrass, Baccharis, neneo, Senecio, Colletia, Berberis, and a couple of maiten trees, only one rose bush. Much of the line was at the bottom of a rocky slope along the edge of dense Colletia. Slept in the neneo. November 10- Cerro Leones. Night mild, no wind, thin overcast. Morning cloudy, not windy. Traps held one live Phyllotis (released), 1 live Bligmodontia, 1 live young Reithrodon, 1 dead Akodon xanthorhinus, and 1 dead Oryzomys. Such diversity! Such scarcity!. Note no Abrothrix. Heard no owls. Back to Bariloche at 9 a.m. Adrian brought a copy of his thesis. His description of where he and