625 Silmore 1931 MICROTUS D Snofping around. Measurements on two large adults that have smashed skulls are as follows: large ♂ 178-39-20-10 " ♀ 172-35-20-9 Strapped out several small areas rather rapidly, getting about 20 mice out of 25 traps in a couple of days. Investigating farther I discovered some small tracts of marshy grassy ground where runway are plentiful and piles of experiment show up on every elevated spot, such as on a bone or a piece of wood. Of those 20 mice about 15 were immature evidently members of the first litters of the season. One ♀ taken had 6 embryos, evidently a second litter. Aug 18. Trapping around the old village site has been very productive of immatures & juveniles. Almost 8-9 out of 10 fall in this class. The three large adults I caught had smashed skulls. They equally active during the day as the night.