P. PEARSON 1955 The vegetation is 6-foot tall fluted pipe cactus (6 flutes) every 100 feet or so, dried weeds fairly thick, mostly a 1 to 2 foot "goldenrod" and dried grass about 8" tall. This cover is almost as thick as a poor wheat field, but not as tall weedy as 1 mi. E San Bartolomé and without as many stebers. Stony ground. also set a short bag of traps among the same kind of fluted cactus at 3500 ft 3 mil East of Chosica, but here among large granite boulders and cliffs, with few weeds, occasional woody shrubs. This seemed to be the most practical place to look for topotypes of linatius. Fog came in at Chosica about 8/2 m. Aug 12 Foggy at 6 a.m. Traps at 4 mi. E Chosica, 3500 ft; fell 8 linatus, all with dirty grey bellies, many with truncated tails. Traps at 4400 ft among "goldenrod" and big cactus fell 2 house mice and 12 linatus. Traps at 1 mi E San Bartolomé had 2 mature zorilla rats and one body eaten? Or zorilla? Many spring tempests as before. After skimming drove up higher. Medium brush seems to be about at San Mateo. Camped at a village a couple of miles NE of the town of Rio Blanco, elevation about 12,200 ft. This has bunch-grass, (vicus?) and Baccharis, looking somewhat like cistophorus. Also creely fatuas and other trees, and some slopes with brush. Set one bag of traps on a stony slope among rather abundant lupine bushes (1-3 ft tall)