earson-1988 13 Buneomys April 16. Michael Christie brought in 3 specimens of Buneomys that he had caught January 27 near Copahue. Two of them are huge, caught in marshy habitat, and one is tiny caught in a stoney bare habitat - but pregnant. Teeth of the big ones are well-worn; teeth of the little one are "young-adult", M3 well in). # TL Tail HF WT GL TR(alv) TR(crown) 650 m 265 100 32 150 testis 13.5 654 m 240 95 32.5 100 36.1 6.40 6.04 testis 13.5 652 f 175 70 26 52 29.6 5.50 4.60 preg. 813 f 170 65 27 26! 5.62 4.78 parous. This female gave birth to the live captive Yanez et al in the Hershkovitz volume give chinchilloides from Tierra del Fuego and adjacent mainland TL 186-237, tail 59-83, HF 25.4-32, GL 29.6- 34.8,TR(alv) 5.6-6.2, diastema 7.4-9.0. For noei from Santiago they give TL 200-268, Tail 61-88, HF 24-32, GL 29.6-35.1, TR(alv) 5.0-6.3, diastema 6.8-9.5. So these monsters are only slightly larger than many of the existing specimens from elsewhere. They are much larger than any we have seen among the ?15? or so specimens from around here. In thinking about two species of Buneomys of different sizes, don't forget my toothrow measurements from hundreds of Cueva Traful specimens; the length of toothrow was spectacularly bi-moda, with the smaller one much more abundant. April 20. The young live one that Michael brought in, born in captivity to #652, has not eaten endive, rosa mosqueta fruits, or nuts of Araucaria. It is very inactive. I have been feeding it apple, rolled oats, and Dogui dry dog food. May 2. The captive eats small amounts of fresh clover leaves, grass, and dandelion leaves. Today it weighed 30 g. It was born in captivity, the mother was MIC 813, and a litter mate that died weighed 3 g on Feb 1, so the birth date must have been about Jan. 30 or 31. (Note discrepancy on who was the mother). Anyhow, this captive has not grown appreciably in the two weeks I have kept it, and it is probably 3 months old. In reviewing the literature, it seems that there must be at least two species of Buneomys in Argentina, mordax, a big one, and petersoni a small one. Chinchilloides from Tierra del Fuego is a big one and may come up along the Andes to Santiago and cross over to meet mordax. So mordax might be a synonym of chinchilloides. Two species or three?