This paper is part of a study of the Psocoptera of the Melanesian arcs; Psilopsocus manus sp. n. (Psilopsocidae), Lophopterygella spilota sp. n., Mouldsia marmorata sp. n., Phlotodes brunneigena sp. n. and Ph. lineatus sp. n. (Myopsocidae) are described from the Bismarck Archipelago and the male of Myopsocus amplus Smithers and Thornton is illustrated for the first time. From the Solomons are described Phlotodes gregarius sp. n., Ph. megops sp. n. and Ph. anomalus sp. n. and from the New Hebrides are described Ph. platyvalvula sp. n., Ph. hoskinsi sp. n. and Ph. sagitta sp. n. Additional records for described species are given from the Bismarcks and the Solomons and keys provided to the four genera of Myopsocidae and the species of Phlotodes Enderlein from each of the three island groups.