(after biodiversity.org.au/afd/taxa/HETEROGASTRIDAE): Heterogastridae are elongate to elongate-ovoid bugs, sometimes with an ant-mimetic appearance. The bucculae are short. The hemelytral membranes have 1 or 2 closed cells. All adult abdominal spiracles are ventral. The phallus is simple with the vesica reduced. The spermatheca is elongate, coiled and simple. The larval dorsal abdominal glands are between terga III/IV, IV/V and V/VI.