Nov. 6. Casita, 40 km. S Nogales, 3300 feet, Sonora. Where grazing has been persistent, the ground cover consists mainly of a narrow-leaved shrub of unknown species (a hop-like seed) and herbs, now mostly dry, although a few composites are still in blossom. Where the grazing has been limited, the ground cover is grassy with scattered shrubs of several species, including a manguinita and one or two composites. In these areas, the woodland is similar in general structure to the Douglas oak-live oak woodland on Mt. Diablo, although the individual trees average smaller; here the woodland is densest on north-facing slopes. Hunted this morning to the west of camp, following up one of the main draws to the main ridge of the range, which rises to approximately 4000 feet. To the north, this range rises higher and a scraggly pines occur along its ridge. The birds observed consisted mainly of residents and some winter residents; migrants were few. Returned at 2:30 p.m. Nov. 7 Remained in camp to keep guard and to finish skinning specimens taken yesterday. Nov. 8 Returned to one of the draws to the west this morning, specifically to hunt towhees; obtained 3 Pipilo maculatus and 2 P. fuscus before the wind became so strong down canyon as to prevent further effective hunting.