HETEROGONY IN BELONOCNEMA-TREATAE MAYR (HYMENOPTERA, CYNIPIDAE)

Through experimental rearing we demonstrated that heterogony (the alte rnation of unisexual and bisexual generations) occurs in the cynipid s pecies Belonocnema treatae Mayr 1881. Female B. treatae (bisexual gene ration) induce galls on the leaves of Quercus fusiformis Small (Fagace ae), from which unisexual females, previously described as B. kinseyi Weld 1921, emerge. Unisexual females induce galls on the roots of Q. f usiformis. The name B. treatae has priority, so B. kinseyi becomes a n ew synonym. The adults of each generation and the galls induced by fem ales of each generation are described. Timing events in the life cycle of both generations are documented as well as hymenopterans associate d with both gall types.