''Diadegma insulare'' is a

wasp A wasp is any insect of the narrow-waisted suborder Apocrita of the order Hymenoptera which is neither a bee nor an ant; this excludes the broad-waisted sawflies (Symphyta), which look somewhat like wasps, but are in a separate suborder. Th ...

first described by

Ezra Townsend Cresson Ezra Townsend Cresson, also Ezra Townsend senior (18 June 1838, in Byberry – 19 April 1926, in Swarthmore) was an American entomologist who specialised in the Hymenoptera order of insects. He wrote ''Synopsis of the families and genera of the H ...

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 In evolutionary ecology, a parasitoid is an organism that lives in close association with its host (biology), host at the host's expense, eventually resulting in the death of the host. Parasitoidism is one of six major evolutionarily stable str ...

of the

diamondback moth The diamondback moth (''Plutella xylostella''), sometimes called the cabbage moth, is a moth species of the family Plutellidae and genus '' Plutella''. The small, grayish-brown moth sometimes has a cream-colored band that forms a diamond along ...

, which is a pest of cruciferous crops.University of Florida
/ref>

References

insulare Insects described in 1865 Taxa named by Ezra Townsend Cresson {{Ichneumonidae-stub