Diadegma insulare is a wasp first described by Ezra Townsend Cresson in 1865. No subspecies are listed.Walley, G.S. (1926) A new Sagaritis from western Canada (Hymen.)., Canadian Entomologist. 58:225.Viereck, H.L. (1925) A preliminary revision of the Campopleginae in the Canadian National Collection, Ottawa., Canadian Entomologist. 57:176-181,198-204,223-228,296-303.Viereck, H.L. (1912) Descriptions of one new family, eight new genera, and thirty-three new species of Ichneumonidae., Proceedings of the United States National Museum. 43:575-593.Viereck, H.L. (1912) Contributions to our knowledge of bees and Ichneumon-flies, including descriptions of twenty-one new genera and fifty-seven new species of Ichneumon-flies., Proceedings of the United States National Museum. 42(1920):613-648.Cameron, P. (1883) Descriptions of new genera and species of Hymenoptera., Transactions of the Entomological Society of London. 1883:187-197.Taxapad Ichneumonoidea. Yu D.S.K., 2009-05-04 It is a parasitoid of the diamondback moth, which is a pest of cruciferous crops.University of Florida
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