1700 ft., Verquén. Day sunny and warm. Evening warm and calm and clear. String 2 hot rats sent to house. Morelli says he has seen as many as 3 Rhea incubating over nest of eggs simultaneously; recently saw an adult rhea with 40? young. Sayp lots are here all year. Also has lots in a small house across the Cholon Curá bridge, at Corral de Piedra and in the Escuelita at Paso de Flores. Sayp social system of guanacos is same as that described by Kopid for vicuñas; bands of 6 cockers under numbering hundreds. He also says spider as big as dinner plate in Verquén. Many lots (looks like myoptes) flying at dusk: above, below, and around one of the rats. At 10:15 one lot flying inside the house, secured. At 11:15 6 lots flying inside the house, caught all of them (non- breeding 2 & 4 myoptes). At 3 a.m. nothing more, At 8 p.m. set about 30 traps in decent chest-high thornbrush, rabbit brush (a yellow composte) and scattered grass. Avites set about 40 in various habitats including moist area with pampea grass clumps. Nov. 22 Morning clear, calm, 5½° C. Nothing in nets. Very traps held Kuthredon, Elipudonta, and Abodon pantos. Avites caught Kuthredon, Abodon, and either a jay or Elipino or an Calomys. Also I got 2 turcos in 2 traps set last evening. Skinned all morning—sunny & warm. Discovered 2 Ruthredon, 3 Elipino, and 1 Abodon (ext.). Heard Calib. quail. Drove to Corral de Piedra, which is slightly downstream and up on the hills from the Río Cholon Curá. Turn right at the bridge, then right about a ½ km along the paved road into a dirt track, then a couple of km farther. It is a rather forlorn outpost with a ranchhouse, some workers quarters, a beautifully made big shearing barn, and two 40 ft.-diam water tanks.