by logs and by small holes in the ground on that south slope. After traveling down the stream course of this ravine for at least a hundred feet lower I discovered Nos. 12275 to 12278 inclusive. They flew from a cove in a projecting lava rock ledge. The ravine was densely shaded at this place January 6, 1927- Another Peromyscus No. 12288 was taken in the shady ravine today. These traps were baited with oatmeal. A Ototylomys No. 12287 was caught at the base of a tree in the ravine. The soil had worked away from the roots of the tree and it was there that I placed my trap. Another Ototylomys No. 12286 was caught about two feet from the ground in a fork. This was a large tree with vines clinging close to its bark. This was in the young coffee Ototylomys No. 12289 was caught far down the volcano in a clump of vines which completely covered a small tree. The trap was set on a horizontal limb. Lionmys Nos. 12284, 12285, & 12288 were caught in a small corn field close to the caretta trail far down the volcano. Traps were placed under small bundles of fodder and by holes that showed dirt to have recently thrown out. Sigmodon No. 12282 was