Eutarsopolipus americanus sp. nov. (Acari: Podapolipidae), subelytral, haemolymph-feeding parasite of Chlaenius praesinus Dejean 1826 (Coleoptera: Carabidae), is described from Oceana County, Michigan and Adair and St. Louis Counties, Missouri. Relationships with 17 previously described species in the myzus group of Eutarsopolipus are discussed. Species in the myzus group parasitize beetle species of the genera Chlaenius, Poecilus, Scarites and Diplocheila. Eutarsopolipus americanus is the first species in the Western Hemisphere in the myzus group with adult females with stylets exceeding 80 micrometers.
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Vol. 18 • No. 1