An updated list of 79 species of Coccinellidae for South Dakota is presented. The list represents a net increase in the state coccinellid fauna from a previously published list of 66 species and subspecific taxa, and it also includes nomenclatural updates. Thirteen species have been added to the list as new state records: Didion punctatum (Melsheimer), Didion nanum (LeConte), Scymnus paracanus linearis Gordon, Scymnus fraternus LeConte, Hyperaspis inflexa Casey, Hyperaspis lugubris (Randall), Hyperaspis troglodytes Mulsant, Hyperaspis brunnescens Dobzhansky, Hyperaspis quadrivittata LeConte, Brachiacantha decempustulata (Melsheimer), Brumoides septentrionis septentrionis (Weise), Hippodamia expurgata Casey, and Hippodamia sinuata crotchi Casey. Two specimens of Coccinella septempunctata L., collected in 1978 represent a new state record of this species from South Dakota. Eight other species were added after reviewing previously published species records and faunal distribution maps. Several entries were deleted from the list based on synonymies. Four others were deleted because of dubious collection records, and one because of misidentification. Comments on recent collection records for adventive and declining native species of coccinellids are also presented. One C. transversoguttata richardsoni Brown from 2006 represents the only known specimen of this species curated since 1979, and one of a few individuals recorded in South Dakota since abundance declined after establishment of C. septempunctata.
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