49. SUMMARY OF MAPS Observer obtained an impression on the island that the whole of the birdlife which was reasonably numerous showed a tidal or movement like a breathing body. On trying to see whether any especial insects or fruit food or flowering was responsible nothing conclusive could be seen and such foods ap- peared to be influenced similarly in all areas. Nor could weather conditions be taken as a guide, except in one species, (Nymphicus) which showed a tendency to retire to deep forest in unsettled weather, but even this was not invariable or regular. Nor did an attempt to throw light on the subject by keeping records of a flower insect, insect, insect mollusc, and fruit feeder and purely insect (flight) feeder (Myiagra) reveal any further facts. My first impression was that at certain times all re- sponded to this outwards movement at the same time, but this did not prove regular though at certain times all did move but at others only one species or two showed movement. INDIVIDUAL MAP NOTES PACHYCEPHALA Generally speaking ♂ ad. showed in unusual habitat and numbered 10 to 1 and more of ♀ or imm. but ♀ increased greatly in numbers in the margins of the forest lands. Though no decrease was noticeable in areas far in in forest, no apparent alteration or increase was noticeable in such areas, the population appearing more or less stationary. An idea that a semi-nomadic population frequented the more or less marginal areas showed neither a positive or negative conclusion from observations made elsewhere. The only real conclusion was that other areas also showed this movement and generally more or less about the same times. It is just possible a number of birds of territory having been dispossessed by encroaching cultivation have an urge to return to their territory and make a more or less