D. PEARSON 1951-1952 stenoys/personna April 7 Pachipuluni. Camped last evening in middle of a pampa truly moloqdo with trees. This morning amid several botto-bubbling I marked off an area 90 yds square for censusing, then hunted on some of the pampa nearby. After lunch counted on my area all the burrows that showed signs of being used in the last day or so. The soil is a grey clay, and it is not good for showing while diggings are fresh new. I counted "new" diggings and "very new" diggings. The "very new" were certainly used today, the "new" probably used in the last few days. The 90 sq yd area contained 319 "new" burrows and 245 "very new". When I had finished my census at 2:30, I waited a few minutes and then from Bus counted 16 trees on the area. They had probably been kept underground by the census for 1-2 hrs and may have been hungry. At the same time, in a 90 deg transit from Bus (including the censused area) 117 animals were visible at the same time. As many as 25 of these may have been guinea pigs, but the rest were trees. Started shooting on the area at 2:45 and collected 7, plus one 2 ft. outside the boundary. Total seen for day was 16 trees, and 15 of them were 7? & all by shooting. At 4:55, after collecting 7 from the census plot, 7 were visible. Some trees were still out at 5:15 and last bubbling at 5:50. All collected today had distinct white original + apilley pattern. Sex ratio of fetuses (all guinea pigs), mostly ? April 8 Collected more trees on the 90 yd census area and along its boundary. Total from area now 21, but only 3 0?. Saw a few guinea pigs on one edge of the area today, but none