Marshall, 1945 e. Palaus Rattus exulans Koror favorable farmland, but I didn't try to make sets, just plunked them down in the trail/ at regular intervals. The notable thing about exulans is the fact that you get two or three rats at a single set. Successive visitors to the single trap are not necessarily of opposite sex. Apparently they occur in small communities or groups. On the evening of 2 December I set the traps and baited them about 6 times and caught all the exulans (13) by midnight. // 3 more got away. In the morning the traps were empty and untouched. Typical places of capture - all more than a quarter mile from human habitation: under bush in grass field, under bush at edge of field, under fallen thatch roof of native house now lying on ground and surrounded by grass, un dehse grass beneath a bank, at base of tree surrounded by grass, at base of clump of cane next to ditch, under fallen log surrounded by grass in old garden, side of garden wall, etc. Note that on 16 November most of the rats were ad males, and on the 2 Dec, most were ad females. These two areas were a mile apart, and in each I reset several imes so that I should have gotten most of the rats present.