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Spruce beetle (Coleoptera: Scolytidae) parasitoids: cephalic morphology of larvae and a key to species (Hymenoptera: Braconidae, Pteromalidae)

Published online by Cambridge University Press:  02 April 2012

Julia Wesley ,
Daryl J.M. Williams ,
David W. Langor  and
John R. Spence
Julia Wesley
Affiliation:
Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada T6G 2E9
Daryl J.M. Williams*
Affiliation:
Natural Resources Canada, Canadian Forest Service, Northern Forestry Centre, 5320–122 Street, Edmonton, Alberta, Canada T6H 3S5
David W. Langor
Affiliation:
Natural Resources Canada, Canadian Forest Service, Northern Forestry Centre, 5320–122 Street, Edmonton, Alberta, Canada T6H 3S5
John R. Spence
Affiliation:
Department of Renewable Resources, University of Alberta, Edmonton, Alberta, Canada T6G 2H1
*
1Corresponding author (e-mail: dawillia@nrcan.gc.ca).
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Abstract

Cast exuviae from final-instar larvae of four species of hymenopterous parasitoids of Dendroctonus rufipennis (Kirby, 1837) were examined for diagnostic characters. The head capsules of Bracon tenuis Muesebeck and Walkley, 1951, Coeloides rufovariegatus (Provancher, 1880), Roptrocerus xylophagorum (Ratzeburg, 1844), and Dinotiscus dendroctoni (Ashmead, 1894) each displayed unique combinations of characters allowing discrimination among species. Head capsules are illustrated, and a key to species is presented.

Résumé

Nous avons examiné les exuvies des larves de dernier stade de quatre espèces d'hyménoptères parasitoïdes de Dendroctonus rufipennis (Kirby, 1837) à la recherche de caractères diagnostiques. Les capsules céphaliques de Bracon tenuis Muesebeck et Walkley, 1951, de Coeloides rufovariegatus (Provancher, 1880), de Roptrocerus xylophagorum (Ratzeburg, 1844) et de Dinotiscus dendroctoni (Ashmead, 1894) portent toutes des combinaisons uniques de caractères qui permettent l'identification des espèces. Nous présentons des illustrations des capsules céphaliques et un clé d'identification des espèces.

[Traduit par la Rédaction]

Type
Articles
Information
The Canadian Entomologist , Volume 138 , Issue 1: Adaptations and Constraints: a Symposium in Honour of Richard Ring / Adaptations et contraintes : un symposium en l'honneur de Richard Ring , February 2006 , pp. 87 - 90
Copyright
Copyright © Entomological Society of Canada 2006

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