The family Promecheilidae Lacordaire, 1859 (= Perimylopidae St. George, 1939) has experienced a broad systematic redefinition and changes to its taxonomic composition during the last decade. Ten genera comprise this relatively small lineage, which is geographically restricted to the Holantarctic region. We further transfer the genus Dolphus Blanchard, 1847 from Tenebrionidae to Promecheilidae. The latter monotypic genus has been taxonomically problematic since its description due to the unique holotype being destroyed during its original species description. A full taxonomic catalog for the family is provided with type localities and references to synonymies, new combinations, and other nomenclatural changes. The catalog is illustrated with high-resolution images of type specimens housed in the Natural History Museum, London.

Scaphinotus longiceps Van Dyke, 1924 (Coleoptera: Carabidae) has formerly been recorded from only three sites (two of which are based on specimens collected in 1901 and the 1930s) in northwestern California. The limited known range, apparent restriction to old growth forests, and few specimens have caused this species to be regarded as potentially threatened or endangered. Ten additional sites have since been found, significantly increasing the known range and potential ecological amplitude of this poorly understood species. Habitus and other images are presented to aid in distinguishing this species from several related species found in the region.

Clastoptera mineralis sp. nov. (Hemiptera: Cercopoidea: Clastopteridae) lives on cypresses (Hesperocyparis spp.) (Cupressaceae) in the San Francisco Bay Area. Many of its post-first-instar nymphs form and live within mineral-crusted spittle masses until adult emergence. No comparable phenomenon has been documented in New World spittlebugs, but mineral coverings have been observed in the Old World spittlebug groups Machaerotidae, which make mineralized nymphal tubes, and Tremapterus Spinola, 1850, which make spittles with mineral casings. In contrast to the more permanent and organized structures of the Old World species, the remains of C. mineralis crust disappear after late fall rains and may depend on the intense California summer dry season for their initial persistence. They might represent an early stage in the evolution of nymphal mineral coverings. Some C. mineralis nymphs are associated with spittle-inhabiting larvae of the fly Cladochaeta sturtevanti Wheeler & Takada, 1971 (Diptera: Drosophilidae), which apparently stunts their growth. Some C. sturtevanti pupae are attacked in turn by a chalcid wasp parasitoid of the genus Pachyneuron Walker, 1833 (Chalcidoidea: Pteromalidae). Both parasitized and unparasitized fly puparia were found associated with C. mineralis mineral crusts.

Several species of lady(bird) beetles have been purposefully and inadvertently introduced for more than 100 years in the Hawaiian Archipelago. Here, we report new state records for two lady beetle species in Hawai‘i, 20 new island records associated with 14 lady beetle species, and prey information associated with eight records. The update includes new geographic distribution records from five of the eight main islands and the Northwestern Islands of the Hawaiian Archipelago. New state records are reported for Delphastus pallidus LeConte, 1878 and Novius pumilus (Weise, 1892) in Hawai‘i. New island records are reported for Brumoides suturalis (Fabricius, 1798); Cycloneda sanguinea sanguinea Linnaeus, 1763; Diomus roseicollis (Mulsant, 1853); Hyperaspis connectens (Thunberg, 1808); Hyperaspis silvestrii Weise, 1909; Nephaspis bicolor Gordon, 1982; Nephus roepkei (Fluiter, 1938); Psyllobora vigintimaculata (Say, 1824); Rhyzobius lophanthae (Blaisdell, 1892); Scymnobius bilucernarius (Mulsant, 1850); Scymnus (Pullus) latemaculatus Motschulsky, 1858; Serangium maculigerum Blackburn, 1892; an undetermined Pharoscymnus sp. previously recorded in Hawai‘i; and an undetermined Sticholotis sp. previously reported from Hawai‘i. We report Laos as a new country record for the Sticholotis sp. Prey records are documented in Hawai‘i that include Tetraleurodes acaciae (Quaintance, 1900) for D. pallidus; Aleurodicus dispersus Russell, 1965 for S. maculigerum; Bemisia argentifolii Bellows & Perring 1994 and Metaleurodicus cardini (Back, 1912) for N. bicolor; Aleurotrachelus trachoides (Back, 1912) for N. indus and D. roseicollis; Aonidiella orientalis for R. lophanthae; and Aphis nerii Boyer de Fonscolombe, 1841 for S. latemaculatus. The new records demonstrate the value of ongoing sampling and regular examination of undetermined collections.

A new genus and new species of Acanthocinini is described: Acanthodepressus auratus gen. nov. & sp. nov. from Cortés, Honduras. The new genus is included in a previous key to genera of Acanthocinini.

The megachilid bees of the genus Chelostoma Latreille, 1809 in Montana, U.S.A., are reviewed. Two Palearctic species, Chelostoma (Foveosmia) campanularum (Kirby, 1802) and Chelostoma (Gyrodromella) rapunculi (Lepeletier, 1841), are reported for the first time from Montana. The Montana specimens represent a range expansion from southeastern Michigan for C. campanularum and from northeastern Illinois for C. rapunculi. These collections appear to represent an established local population for C. campanularum with specimens from multiple dates, years, and locations in Bozeman, Montana; specimens of C. rapunculi have only been found in one location and year. The habitat, distribution, and potential ecological impacts of establishment of these two non-native species in Montana are discussed. An identification key to the Chelostoma of Montana is provided.