A key is given for 16 species in the genusMacrosiphoniellaDel Guercio in America north of Mexico, including one new species from Manitoba,Macrosiphoniella paucisetosasp.nov. fromArtemisiaspp. An annotated list is provided which includes tentative identification ofM.oblonga(Mordvilko) intercepted on plants ofChrysanthemumimported into the United States of America from Europe.
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A. G. Robinson (1987) studied this question.
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