improved. Fenced on both sides. Behind the fences was brushy steppe (neneo, Senecio, Calafate, bunchgrass, Calceolaria, but in the right-of-way (mostly stoney) were a few calafate bushes, small isalnds of Rumex, and scattered low grass plants and herbs. I put 20 Shermans and 20 Museum Specials alternating through the brushy steppe. Anita put 10 Shermans and 20 Museum Specials and 1 jump trap along a fence and under some Calafates in the right of way. Sky clear, temperature mild, wind moderate. This locality is 30 km W Jose de San Martin, Chubut. Temperature mild. Counted 5 recently squashed hares all day. December 4.- 30 km W. Jose de San Martin. Light frost on the windshield and sleeping bags. Slight overcast, At 6:30 a.m. my traps had 1 Eligmo morgani and 1 Akodon xanthorhinus. Anita had 1 Eligmo and 1 Notiomys edwardsii! 1 small fox skull. Smelled skunk during the night, birds seen or heard were seed snipe, Zonotrichia, pechocolorado, ibis, geese (male white female brown). Saw new digging of a tuco-tuco near the car and Anita heard another nearby (tuc-a-tuc). The Notiomys was crosswise in a Museum Special set in front of a hole in very sandy soil under a big low clump of calafate (Berberis) that also sheltered some Senecio and Calceolaria. The upper incisors were broken, perhaps from biting the killing wire on the trap. One front leg had a healed scar and slightly swollen paw. We immediately set 10 more Museum Specials in the immediate vicinity of the catch, but caught nothing before we left at about 9:30. The mouse was caught in front of a hole, and the Berberis clump had light sandy soil piled around the roots as though a tuco had been there. At least two tucos lived within 30m. Saw no parasites. Left about 10:30 for south. Stopped at Nueva Lubecka- a clump of cottonwoods with a stone Communications building with people, chickens, ...as before. Bushy steppe around it. The country quite variable, sometimes bunchgrass, sometimes bushy steppe, sometimes acres of blooming cola de Pichi (Nassauvia), sometimes incredibly overgrazed. 15 km S of Los Tamariscos the road cuts through some hard rock so that there were piles of good viscacha habitat along the road for a few hundred meters. We looked and found Reithrodon droppings and a hystricomorph dropping, probably guinea pig. But we saw no guinea pigs. On the stretch between Rio Mayo and Perito Moreno we saw one rhea, the only one so far. No guanacos. Lots of sheep. Got to Perito Moreno about 6 p.m.without seeing anything that looked like an ashfall. Nothing. 6 squashed hares. Then drove west along the lake and put