Pipilo fuscus 5. Zerezo, 3 mi. N of Pachuca, 9000ft Hidalgo, Mex. July 3, 1946 South down the mountain to Zerezo, which is about 3 miles away. The town of Zerezo is situated at the foot of a steep south-facing slope. At 9000 ft I saw 2 Brown Towhees perched on a rocky outcrop on the south-facing slope about 150 feet above Zerezo proper. Just after these birds were sighted a third Brown Towhee flew over my head and out of sight. The P of the pair was collected. The nearest cultivation to this point was a small maguey field about 300 yards down slope. A Rock Wren and several Mexican Green-backed Goldfinches were seen nearby. The south-facing slope is steep, with scattered Juniper shrub and small patches of Baccharis sp. The grass cover is short and sparse, and the soil thin. Consequently there is a great deal of erosion, and here are many large rock outcrops and loose rocks on the slope. These rocky outcrops seem to be of weathered granite, and are very loose and crumbly. I then went about 300 yards down slope, to the outskirts of Zerezo, where I had seen from above numerous small corn and maguey fields on either side of a barranca, the floor of which was filled with large, loose boulders. It looked like excellent Brown Towhee habitat. I spent about 1 1/2 hours working the bed of the barranca and the adjacent culti-