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Review and identification keys to the ichneumonid parasitoids (Hymenoptera: Ichneumonidae) of Nearctic Choristoneura species (Lepidoptera: Tortricidae)

Published online by Cambridge University Press:  02 April 2012

Andrew M.R. Bennett
Affiliation:
Canadian National Collection of Insects, Agriculture and Agri-Food Canada, Ottawa, Canada K1A 0C6 (e-mail: [email protected])
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Abstract

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Wasps of the family Ichneumonidae recorded as parasitoids of Choristoneura Lederer (Lepidoptera: Tortricidae) in North America are summarized. A total of 113 species in 45 genera and 11 subfamilies have been reliably reared from 10 species of Nearctic Choristoneura. Twenty-one more species are listed as possible parasitoids of Nearctic Choristoneura, based on rearings from Palearctic Choristoneura species and (or) limited introductions to North America. Well-illustrated identification keys are provided to the subfamilies, all genera, and species of 39 of the genera. The species of Choristoneura used as hosts by the 113 ichneumonid species are tabulated, as well as the wasps’ geographic ranges. The biological characteristics of the ichneumonid subfamilies parasitizing Choristoneura spp. are described and compared. Erroneous Choristoneura host records and synonyms for all ichneumonid taxa previously recorded from Nearctic Choristoneura spp. are given. Phaeogenes gaspesianus Provancher is moved to Dirophanes Förster, forming D. gaspesianus (Provancher) comb. nov. New host records are Phaeogenes cacoeciae Viereck and Scambus hispae (Harris) on C. rosaceana (Harris), D. gaspesianus and Pimpla disparis Viereck on C. fumiferana (Clemens) (P. disparis having been introduced to New Brunswick to control the gypsy moth, Lymantria dispar (L.)), and Exochus turgidus Holmgren on C. occidentalis Freeman.

Résumé

On trouvera ici une rétrospective des guêpes de la famille Ichneumonidae signalées comme parasitoïdes de Choristoneura Lederer (Lepidoptera: Tortricidae) en Amérique du Nord. En tout, 113 espèces appartenant à 45 genres et 11 sous-familles ont été élevées de façon fiable à partir des 10 espèces nord-américaines de Choristoneura. Vingt-et-un espèces additionnelles sont signalées comme parasitoïdes possibles des Choristoneura néarctiques, d’après des élevages faits sur des Choristoneura paléarctiques et (ou) des introductions de portée limitée en Amérique du Nord. Des clés bien illustrées ont été dressées pour l’identification des sous-familles, de l’ensemble des genres et des espèces de 39 de ces genres. Des tableaux présentent les espèces de Choristoneura utilisés comme hôtes par les 113 espèces, ainsi que les répartitions géographiques des guêpes. Une description de la biologie des sous-familles d’ichneumonidés parasitoïdes de Choristoneura permet des comparaisons entre les groupes. Une liste est donnée des signalisations d’hôtes et des synonymies erronées pour tous les taxons d’ichneumonidés mentionnés antérieurement comme parasitoïdes de Choristoneura néarctiques. Phaeogenes gaspesianus Provancher est transféré au genre Dirophanes Förster, devenant D. gaspesianus (Provancher) comb. nov. De nouvelles associations d’hôtes sont signalées: Phaeogenes cacoeciae Viereck et Scambus hispae (Harris) chez C. rosaceana (Harris), D. gaspesianus et Pimpla disparis Viereck chez C. fumiferana (Clemens) (P. disparis a été introduit au Nouveau-Brunswick pour contrôler la spongieuse, Lymantria dispar (L.)) et Exochus turgidus Holmgren chez C. occidentalis Freeman.

[Traduit par la Rédaction]

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Copyright © Entomological Society of Canada 2008

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