D. P. PEARSON 1955 a cliff above the trail between the forest and the spring to the west of the forest 25+ trafe altogether, common bird. Oct. 28 Two Phyllotus ardinii in the bushy line and 6 in the forest line. Also 1 at the weed place. (Absdon in the forest line. Put out a line of traps in bushy place near upper edge of forest, the brush in clumps 6-12 ft tall, and another line in the gloomiest part of the forest. Dr. Koefke incapacitated early all day by severe rheumatism x One bat flying at dusk and another under the trees after dark. Oct. 29 Nothing caught in the gloomy part of the forest; one mircury-jump in the bushy line. Hunted birds with Mrs. Koefke. Bird fauna is a curious combination of altiplano, bush, + forest species. Moths perotis pentlandi, Cricothos, parrots, wild pigeon, Heliofera + Zaratornis, Zyzolophis, Tropodytes, 8 kinds of hummingbirds, etc. Saw condors twice. The zaratonis are tree-toe feeders + perchers. Song bek- bek-bek-bek-bek getting more rapid at end. Not repeated. Dr. Koefke in bed all day. Put out 25+ traps in woods behind camp. Oct. 30 One Phyllotus ardinii in trap. The woods specimens look darker than the two from the brush west of the forest. Hunted birds to the spring east of forest and both then off to San Bartolomé. 10 hours down, Dr. Koefke proceeding with caution and with great pain, We collected at Zárate 4 Zaratonis and estimated that the total population of the forest was 15 individuals, all females. It is unlikely that the males live or visit at Zárate.