Uta 1/2 mi. S Prineville, 2900 ft., Crook Co., Oregon. The Uta of this region seem pretty well restricted to grassy slopes in which rocks are embedded. Scelop- us may be present in the same localities. Unlike the Scelopus here they are more ambulatory wandering about constantly and not restricting their foraging to the tops of rocks. At the above site the greatest num- ber ever found in a mass of large loose rocks, a part of an outcropping from the slope, in which Marmots lived. There were some 5 or 6 Utas on this mass which was little over 20 ft in diameter. The Utas wandered over this mass paying no attention to each other or any particular locality. When frightened they took cover by penetrating through a pile of crevices between rocks. They relied on no particular crack for this retreat but used the most handy one. Actually they are relatively shy retreating but a little distance when startled and very quickly returning to the open and going about their business. They raise and lower themselves on all four legs very much as Scelopus do. The intent in this case seems a mixture of observation and of defiance.