Caldwell 1938 22. - Warbling Vireo - one heard singing on same hillside as Gray Vireo; Juniper Canyon - yucca slope. - Gray Vireo + See photographic notes - Gray Titmouse - Found young out of nest following parents around. Also saw adult Titmice digging in antlion pits, and hunting for them beneath or trees on the ground. Adult Titmice also seen to forage at the bases of yucca baccata. - Screech Owl - Found nest + 6 young in hole in dead Juniper near camp - later to be collected. May 27/938 Early in A.M went with Dr. Sennell & D. Army to Scotts Fales where I spent some time looking for Bench Mark and observing ruins. Spent about 1 hr. observing + collecting. Thence went to Rock Springs + was shown historic place where army stationed in eighties. Spent part of afternoon photographing reptiles aided by T. Rogers. Observations + lists for localities visited today: Scotts Fales - atop divide and more typically Great Basin Vegetation than where we are camped +: Two Junipers in Artemisia & Pereskia. Occasional outcrops of large granite boulders. - Cassel Thrasher (one seen and shot from fence posts