1927 P.6 Los Esemiles, Dept., Chalatenango, Salvador The mountain west of camp, here for the first time in my tropical experience I saw an oak rain forest. Tomorrow I shall describe more in detail the vegetation encountered there. Peromyscus Nos. 12412, 12414, 12415, 12416 & 12417 were taken in snap traps baited with oatmeal and set under cotton logs, under moss and ferns. A very interesting little specimen which I assume to be Scotinomys Pitymys No. 12419 was caught by a small hole that led through some moss back under a huge oak. While running the trap line we saw a small squirrel, Sciurus deppei No. 12425, dash out of the ferns and up an oak which was covered with parasitic growths. Some of the growths on the tree too matched the rich coffee color of the squirrels pelage that it was a very difficult job to locate the little animal. We saw another as it ran along a rail like fence but it was too quick for us and escaped into the dense ferns and brush.