| chalcidfly | (noun) any of various tiny insects whose larvae are parasites on eggs and larvae of other insects; many are beneficial in destroying injurious insects | Synonyms: chalcid, chalcid fly, chalcid wasp |
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| gadfly | (noun) any of various large flies that annoy livestock | - |
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| (noun) a persistently annoying person | Synonyms: blighter, cuss, pest, pesterer |
| medfly | (noun) small black-and-white fly that damages citrus and other fruits by implanting eggs that hatch inside the fruit | Synonyms: Ceratitis capitata, Mediterranean fruit fly |
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| sandfly | (noun) any of various small dipterous flies; bloodsucking females can transmit sandfly fever and leishmaniasis | Synonyms: Phlebotomus papatasii, sand fly |
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| shadfly | (noun) slender insect with delicate membranous wings having an aquatic larval stage and terrestrial adult stage usually lasting less than two days | Synonyms: dayfly, mayfly |
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