The Canadian Entomologist (2006) 138, 87-90

J. Wesley, D.J.M. Williams, D.W. Langor and J.R. Spence (2006)
Spruce beetle (Coleoptera: Scolytidae) parasitoids: cephalic morphology of larvae and a key to species (Hymenoptera: Braconidae, Pteromalidae)
The Canadian Entomologist 138 (1), 87-90
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.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Daryl J.M. Williams

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
general biology - morphology - evolution
identification/taxonomy

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Dendroctonus rufipennis
Roptrocerus xylophagorum (parasitoid)	Dendroctonus rufipennis
Dinotiscus dendroctoni (parasitoid)	Dendroctonus rufipennis
Coeloides rufovariegatus (parasitoid)	Dendroctonus rufipennis
Bracon tenuis (parasitoid)	Dendroctonus rufipennis