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Biological control agents imported in the 1920s
Alysia manducator (Hymenoptera: Braconidae)
Coccidoctonus dubius (Hymenoptera: Encyrtidae)
Elis sp. (Hymenoptera: Tiphiidae)
Encarsia citrina (Hymenoptera: Aphelinidae)
Eupithecia pulchellata (Lepidoptera: Geometridae)
Eupithecia pyreneata (Lepidoptera: Geometridae)
Ithone fusca (Neuroptera: Ithonidae)
Lathrolestes luteolator (Hymenoptera: Ichneumonidae)
Mellicta athalia (Lepidoptera: Nymphalidae) = Meltaea athalia, heath fritillary butterfly
Metaphycus lounsburyi (Hymenoptera: Encyrtidae)
Microphthalma michiganensis (Diptera: Tachinidae)
Microterys flavus (Hymenoptera: Encyrtidae) = Microterys nietneri (Motschulsky, 1859)
Microterys nietneri (Hymenoptera: Encyrtidae) = Microterys flavus
Ocytata pallipes (Diptera: Tachinidae)
Scutellista caerulea (Hymenoptera: Pteromalidae) = Scutellista cyanea Motschulsky
Tiphia sp. (Hymenoptera: Tiphiidae)
Triarthria setipennis (Diptera: Tachinidae)
Unidentified chalcid (Hymenoptera: Chalcidoidae)
