Gilmore 1931 MICROTUS seen running before one's approach During the course of a day's walk anywhere. at the present time, the (first) litters of the year have scarcely nearly all appeared for all females not heavy with young show signs of recent delivery. The mouse population furnishes the year around (?) (at least the summer) good supply for foxes, jaguars and owls. The only type of habitat where they do not seem to live is the rocky bucklet rookeries where poxys & Clethrionomys are taken. However, the day I left I took a young one in the middle of the rock pile - evidently it is merely a dispersion of young after due to over- populating the other habitats. Piles of droppings are occasionally seen along the runway. General appearances indicate that these piles are built up during the winter. I found no fresh large piles but on