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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
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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- Copyright © Entomological Society of Canada 1960
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