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A New Species of Monellia Oestlund, with a Synopsis of the Aphids Attacking Hickory and Walnut in Canada

Published online by Cambridge University Press:  31 May 2012

W. R. Richards
W. R. Richards
Affiliation:
Entomology Research Institute, Research Branch, Canada Department of Agriculture, Ottawa, Ontario
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Extract

The walnut and hickory aphids comprise the genera Chromnaphis Walker, Monellia Oestlund and a somewhat aberrant species of Myzocallis Passerini. Chromaphis contains a single species that occurs widely on walnut in Europe and North America. Monellia is larger, is restricted to North-America, and has been recorded from both walnut and hickory. Four species of Monellia occur in Canada, one of which is herein described as new.

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Type
Articles
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The Canadian Entomologist , Volume 92 , Issue 3 , March 1960 , pp. 221 - 230
Copyright
Copyright © Entomological Society of Canada 1960

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