942 - 1933. 75. French Gulch, 6700 ft., Piote Mts., Oct. 27, 1933. 291 Eutamias quadrivittatus ♂ wt: 64 215-87-33-19 292 Microtus ♂ wt: 87 211-69-24-16 293 Microtus ♀ wt: 67 200-65-23-16 294 Peromyscus boylii ♀ wt: 24 196-101-22-19 295 Peromyscus m. sonorensis ♂ wt: 16 146-65-19-17 296 Thomomys ♀ wt: 91 190-55-28-6 -Oct. 28, 1933- We have found out now why specimens are so hard to get out of here. Mr. Woods, who lives in the ranger cabin at the lower end of the meadow says that most of the mammals have been poisoned out in the past few months. That explains a good number of things; the empty pack rat nests for instance. This is probably the story, as near as can be told from available facts. Some time ago, just previous to the poisoning, and coincident with the migration of root-mice in Thompson canyon, all the root-mice in the hills surrounding the meadows migrated down to the willow lined low creaks of the meadow. No sooner than They had no more than commenced to build