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Torymidae (chalcid seed flies; suborder Apocrita, superfamily Chalcidoidea) Family of small to medium (2–13 mm long), elongate, usually metallic green, yellow, or black wasps whose ovipositors may be as long as or longer than the body, and whose hind coxae and femora may be enlarged. Most are parasitic on dipteran and hymenopteran gall formers, although some eat seeds. The eggs are laid in galls or the seeds of trees, particularly conifers, and some are laid in caterpillars and mantid oothecae.