off within the last ten days and although many old ru were evident, all the cover was gone. I left 6 traps right at the waters edge h I returned early June 7 and collected the following: 4 - Microtus pennsylvanicus #5[illegible] 2 - Peromyscus 1 - Reithrodonomys #604. The three smaller mice-Peromyscus Reith. were taken where the cover was lately burned. Weather very damp and cold. It had rained most of th and was raining slowly 7th morning of the 7th. From the appearance of the runs I had expected a 50% catch. It was a great night for toads. I caught 6 small grayish shade foot toads in the mowed traps. The habitat of M.L. pennsylvan is, from a study of this location very close to the water. All o their runs were within six feet of the waters edge. As compared with Microtus manicus, which, as pointed out elsewhere, seems to