AbstractPre‐dispersal seed losses to insects in species ofLeptospermumat Wilson's Promontory in south‐eastern Australia varied markedly between species, seasons, sites and individuals. The proportion of fruits attacked by insects averaged 11% (range 3–37%) in populations ofLeptospermum juniperinum, 23% (6–95%) inLeptospermum myrsinoides, 23% (0–47%) inLeptospermum laevigatum, and 28% (8–45%) inLeptospermum lanigerum. The proportion of seeds lost in attacked fruits also varied widely. Differences between species varied markedly from year to year, but differences between sites were relatively constant. Fruit production byL. myrsinoideswas unusually low at most sites during 1984; in each case this coincided with unusually high rates of insect attack, suggesting that predator satiation operates during nor