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Diagnostic characters of Glaresis mendica Horn are discussed, and an undescribed species, confused with G. mendica by authors subsequent to Horn, is described as Glaresis gordoni new species. A second new species, Glaresis zvirgzdinsi, is described from two isolated sand dunes in Yuma County, Arizona, USA. Diagnostic characters of the new species, as well as those of G. mendica, are illustrated.
Phyllophaga (Listrochelus) benwarneri new species and Cinacanthus cunninghami new species(Coleoptera: Scarabaeidae) are described from dune systems in northern Arizona and extreme southern Nevada, USA. Habitus and diagnostic characters of these species are illustrated, and couplets from the respective, most recent (sub)generic keys are modified to incorporate the new species. Available habits and habitat information for each species, and a discussion of the Phyllophaga “senex complex” of species are provided.
New World species of the histerid beetle genus Xestipyge Marseul (Coleoptera: Histeridae: Dendrophilinae: Paromalini) are reviewed, and X. skelleyi, new species, is described. A dichotomous key and illustrations are provided as identification means for the now five included species from the Western Hemisphere.