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THE NEARCTIC SPECIES OF PERILISSUS (HYMENOPTERA, ICHNEUMONIDAE, CTENOPELMATINAE)

Published online by Cambridge University Press:  31 May 2012

John R. Barron
John R. Barron
Affiliation:
Centre for Land and Biological Resources Research, Agriculture Canada, Research Branch, Central Experimental Farm, Ottawa, Ontario, Canada K1A 0C6
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Abstract

The Nearctic members of the genus Perilissus Holmgren, parasites of various species of sawflies on coniferous and deciduous trees and shrubs, were revised. There are 17 species of which 10 were described as new. These were placed in six species groups as follows: the discolor group composed of P. concavus, P. impunctatus, P. gilvus, P. triangularis, P. galbipes, P. rutilus spp.nov., and P. discolor (Cresson); the araius group comprising P. araius Burks and P. helvus sp.nov.; the coloradensis group composed of P. coloradensis (Ashmead) and P. spatulatus sp.nov.; the anatinus group consisting of P. anatinus sp.nov.; the bicolor group including P. bicolor (Cresson), P. townesi Burks, and P. cancellatus sp.nov.; and the concolor group comprising P. concolor (Cresson) and P. decoloratus (Cresson). Relationships of the genus Perilissus with other genera within the tribe Perilissini were discussed. Also, presumed relationships of the species groups and species of Perilissus were interpreted.

Résumé

L’auteur révise les membres néarctiques du genre Perilissus Holmgren qui parasitent diverses espèces de mouches-à-scies. Parmi les 17 espèces décrites, 10 sont nouvelle à la science. Elles sont réparties en six groupes d’espèces comme suit : le groupe discolor qui comprend P. concavus, P. impunctatus, P. gilvus, P. triangularis, P. galbipes, P. rutilus spp.nov. et de P. discolor (Cresson); le groupe araius formé de P. araius Burks et de P. helvus sp.nov.; le groupe coloradensis composé de P. coloradensis (Ashmead) et de P. spatulatus sp.nov.; le groupe anatinus où l’on retrouve P. anatinus sp.nov.; le groupe bicolor qui inclus P. bicolor (Cresson), P. townesi Burks et P. cancellatus sp.nov.; finalement, le groupe concolor comprenant P. concolor (Cresson) et P. decoloratus (Cresson). On discute des liens entre le genre Perilissus et les autres genres de la tribu des Perilissini. Une interprétation des relations possibles chez les groupes d’espèces est également présentée.

Type
Articles
Information
The Canadian Entomologist , Volume 124 , Issue 2 , April 1992 , pp. 211 - 272
Copyright
Copyright © Entomological Society of Canada 1992

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