1948 P. PEARSON 18 marked, also smell for ? tucbs in the place, and pig. It seems rather strange to clamber over the hills here for several hours and see no signs of rabbits or ground squirrels or meadow mice, or gophers, and practically no sign of any mice. One certainly can't blame the pigs for the scarcity of small mammals, for there is still lots of food and cover (and Heteromys lives independently amidst many peccaris). If Peromyscus is the only mouse, it should be interesting to investigate its abundance, is it more abundant here, without competitors, than elsewhere with? Aug 30 Twelve Peromyscus in the traps (about 120), aside from the 6 pit ups there were 3 adult males, 2 min. females, and 1 min. male, also one Philodelus in jump trap at edge of stony beach at bottom of gully. Stomachs contained arthropod remains looking like "beaks" of batylids, limbs + abdomen of Jerusalem cricket, and possibly small crab limbs. Also found some droppings, not yet analyzed. Biggest disappointment in the trap line was not the occurrence of only Peromyscus but the abundance of ants. 90% of the traps were battlesome in AM, mostly an account of very tiny ants. Captured 9 peppers (Hyles) in the circular stock tanks last night, and one in the marshy overflow from it. Noticed that bats were drinking from it so tonight strung 2 no. 26 wires across it // a foot apart and about 1 1/2 inches above the water (tanks 6" diameter). Out of