LL Wolf 1963 Aimophila rufescens August 5 8 mi. N. Cuemavaca, Morelos, Mexico O heard used 8 foot stub, dead limbs ranging from 10-30+ feet above ground. Also line pine limb ~ 35 feet up near trunk. Sang a few songs while mostly hidden in oak foliage. Generally uses oaks but will use pines. O O heard were spaced 100 yards apart. When recording heard what was probably the union call of rufescens just after O flew into brush on ground. Did not see either bird emerge. August 7 9 mi. SE. Iguaca de Matamoras, Puebla. Surprised to find this species in essentially thorn forest vegetation. There were some scattered scrub oaks but they were not very common. O O were singing- one collected from dead branch near top of 25 foot tree on rocky hillside with ~ 50% herb layer cover, song which was grass. One probable & sun but none collected. August 11 11 mi. SW. Matatlan, Oaxaca, Mexico km. 608 Heard 2 singing O O + found one pair in oak-studded hillside. Parts of hills were thorn scrub, especially close to road, but Rufey Sparrows were in moister oak-woodland.