P. PEARSON 1951-1952 Tamarix spinosa census area: I now know of only 3 trees remaining: one at 9, one at 24, and the juvenile at 18. Including these, the total for this area will be at least 12 (which includes 3 juveniles) Jan. 18 The instructions two below Bus who has so neatly and persistently produced a new mound each day (see photo) has the following distances between holes (from south to north, hence chronologically: 4 ft; 4, 4 1/2, 10, 6, 4, 8, 8, 7 1/2, 6, 5, 5, 9, 5, 7, 5 1/2, 7, 9, 4, 5. The piles look like they average about 11 qtrs. If the burrows average 9 1/2 cm in driving, then it appears that of the tunnel dirt is brought to the surface. at 8 a.m., cloudy bright, shade temp. was 7° moist soil 1/2 cm below surface, 12°; two burrow 12" deep 7°. Jan. 19 No fresh diggings on census area, but presumably we failed to remove one at 24, one at 9, and a juvenile at 18. Since 24 and 18 are lone range only half on the area, we might say that only 1 adult remained, and 1 juvenile. Thus, the area supported 1 1/2 trees: 8 1/2 removed including 2 juveniles, 1 1/2 adults not removed, and 1 juvenile not removed. Total: 3 adult males, 4 adult females, 2 juvenile males, 1 juvenile sex undetermined, 1 adult sex undetermined. Feb. 1 Lamyra Arenaria, 13,700ft. Here is a pampas rat midden that down Margery - down Margyriacris, tufts of grass about 1" high, plus numerous litter and plants. Tools of 2 sp., hags, grazed by llamas, offroad sheep. Would have expected stronger permanency at Margery, but no bubbling and 3 caught are near to opimus. The ground in which they are living is less sandy, earthier, than in other opimus locations, with more