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The members of this family are internal parasites of the larvae of Chrysopidae.
Revision: Pschorn-Walcher, 1955. Schweiz. Ent. Gesell., Mitt. 28: 233-250 (Palearctic species).
Taxonomy: Ashmead, 1893. U. S. Nat. Mus., Bui. 45: 330-331. —Ashmead, 1902. N. Y. Ent.
Soc, Jour. 10: 243. — Kieffer, 1914. Das Tierreich, Lief. 42, pp. 57-62. — Riek, 1955. Austral.
Jour. Zool. 3: 258-265. -Ceballos, 1965. Graellsia 21: 11-16.
Morphology: Oeser, 1961. Berlin Zool. Mus., Mitt. 37: 72-73 (ovipositor).
Genus HELORUS Latreille
Helorus Latreille, 1802. Hist. Nat. Crust. Ins., v. 3, p. 309.
Type-species: Helorus ater Latreille. Monotypic.
Copelus Provancher, 1881. Nat. Canad. 12: 206.
Type-species: Copelus paradoxus Provancher. Monotypic.
Helorus paradoxus (Provancher)
As currently identified this species occurs throughout Continental
United States (except Alaska); known also from N. B. and B. C. Host: Chrysopa
)naiuscula Banks; Chrysopa spp.
Copelus paradoxus Provancher, 1881. Nat. Canad. 12: 207. ♀.
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Biology: Clancy, 1946. Calif. Univ. Pub., Ent. 7, pp. 407-418. —Clausen, 1962. Entomophagous
Insects, pp. 266-270.
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