P. PEARSON 1951 6 Had time to set about 20 museum species before dark. The surprising thing about the flora vegetation is how little nitrogen it is: practically no grazing. Grasses play a small part in its composition Dec 7 Mornine. A foil dropping contained no fur, only seeds. Temp. at sunrise 60° alt. 4000'. Refueled at Mogreque then set out for Volcan Tutupaca, Pasto Grande + Mazamirry. A little grass appears above Mogreque at about 6300ft, then cactus and scrub become increasingly abundant. Camped about 1:30 at 11,200ft, along the Rio Torata (dry except for a few puddles) where Breckering cactus, and other scrub were fairly abundant. Set out about 65 museum species on a rocky slope of grass, scrub, and cactus. Tiny toads swarming around a couple of seeps near the abandoned village in which we are camped. Some mines nearby with powder-blue and robin's-egg blue tailrings. Several sets of abandoned terraces on the way up the hill from Torata. W.T. at 3:15 at our new camp temp was 66°, humidity 40%. Food fauna seen consists of tiny toads + tadpoles, large tadpoles in a pool in the quebrada, ground doves, a startling black hummingbird, and viscachas (2 seen) jacklighting at 7 to mine tunnel. Found 2 frogs under brules 100feet from water. 3 hummers in tunnel Dec 8 Temp at 5am 36°. At 3:15 p.m., sunny & windy, 60° and 46%. My traps held 1 Bolony's berlyphatini (stuffed so must have been caught yesterday afternoon) and 3 Phyllotata, probably of 2 kinds (judging by foot size).