Pearson-1989 Auliscomys micropus December 9 - Lago Guillermo. 100 traps in nire-bamboo with lots of lush green grass caught 11 Auliscomys. Four were released, between 25 and 50g. The following 7 were dissected: 95g F open vagina. Nipples large. Uterus with 7 conspicuous scars. Ovaries with big pink corpora lutea. 30g F vagina open. Uterus 1mm, white, no scars. Ovaries developed, but no corpora lutea seen. 30g M Testis 5, white; sv 2. 28g F vagina not open. Uterus 1mm, pale, no scars, ovaries no corpora lutea. 17.5g M Testis 4mm, white; sv 2. 18.5g M Testis 4mm, white; sv 2. 16g M Testis 4mm, white; sv 2. The tail skin slips off easily when live animals are handled by the tail. Young 30-g individuals seem to be coming into breeding condition. December 12 - 11.5 km W Bariloche. Caught a big adult at the edge of a meadow in nire/radial/retamo/mutisia: 78 g female, vagina open, nipples large. Pregnant. Fetuses 20mm CR: 2 right, 1 left.