Pearson 1987 51 Stenomys Oct 24 15 km SE For Meneses, Rio Negro. Thorny Steppe with Barren, light sandy soil. Two Steel traps set in two tunnels caught 2 Sector Dolphin. Heard no terrier and saw no fresh digging. Oct 25 5 km W Caimaco. Thorn bush Steppe on ridge, then rocky outcrop. Old tucu burrow in the big clumps of thorn, but no fresh digging. They eat thorn twigs and especially, stems of the lusky-looking daisy plants (which the sheep, horse, and goats don't seem to touch). The only tucu heard near was up in the rocks in a big thorn island. Same timbre as tucu from Bandook but not this tucu-a-tucu but more run together. We caught one, a female with 5 middle-sized fetus and 1 small rearing fetus; few bodily scars (dry dice?). We dug out her burrow, about 5 m, back to a nest chamber that contained a cache of green, daisy brooms with leaves, plus 2 globes of very dry grass, Pure grass. Scores of wiggly larvae like fly maggots, tiny? midge?, a few pseudoscorpions, and assorted other inhabitants. Enough to record a Stenomys Oct 26 Back to the For Meneses Sector (Riverside) and set steel traps at 21 good tucu tunnels (although almost no fresh signs). Caught nothing.