1927 P.H. San Jose del Sacare, Sept., Chalatenango, Salvador. dragged back into the rocks, I did not find the usual signs of Neotoma. Late in the afternoon I returned to the cliff with snap traps both large and small to give the place a real test as to its mammalian fauna. I saw three squirrel nests in the oaks today. March 12, 1927- The traps that were set along the rocky ledged cliff as possible sets for Neotoma, had one Otolymys this morning. Another trap had Peromyscus, No. 12701. The ants had eaten the skin so badly that I could not put it up, therefore made a skeleton of it. It is obviously the Pacific coast lowland form. The female Peromyscus, No. 12700, was cought within thirty feet of where I caught a male of that species yesterday. This is apparently a rare species in this locality. The two Peromyscus, Nos. 12707 and 12708 were caught just inside of the Sonoran zone in a dry stream bed which flows down had sub-tropical vegetation. The two Sciurus, Nos. 12709