133 Aimophila ruficeps carpata Oct.22 El Batil, 5100 feet, Sinaloa in the past week Observed several times on dry, open slopes where the woodland had been partially cleared and where there were scattered, low brush thickets and a broken, low plant cover. In physical character, the habitat resembled closely that occupied by the species in Doolley Canyon, Berkeley, for instance. The notes of these birds, as well as their actions, are identical with those of the more northern birds. Nov.6-10 Casita, 40 km. S Nogales, 3300 feet, Sonora. Common along draws and open or dry woodland slopes where there is afforded a low shrubby cover.