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First North American records are presented for Cryptocephalus moraei (Linnaeus, 1758) (Coleoptera: Cryptocephalinae) and Psylliodes dulcamarae (Koch, 1803) (Coleoptera: Galerucinae: Alticini), as confirmed by morphology and DNA barcoding. Additional information is presented about phenology and host use for C. moraei, the first European Cryptocephalinae to be found elsewhere as conclusively adventive. Cryptocephalus moraei is expected to have no ecological impact on its host, the adventive Hypericum perforatum Linnaeus (Hypericaceae). However, P. dulcamarae, the second recently discovered flea beetle associated with the adventive Solanum dulcamara Linnaeus (Solanaceae), probably does harm that host. Both species are hypothesised to have arrived from Europe with woody plant material imported with soil during 1960–1965. A literature review of introduced Chrysomelidae found that Canada and the United States of America are together home to 68–78 species of adventive Chrysomelidae. All non-Bruchinae species among these are both native to Europe and occur either in Canada or both Canada and United States of America, except for intentionally introduced biological control agents and two species that feed on Eucalyptus L’Héritier de Brutelle (Myrtaceae). This suggests a dominant role of accidental introductions of cool-climate European species in recent unplanned additions to the fauna of leaf-feeding Chrysomelidae in North America.

The Canadian Entomologist and its associated publications (Supplements of The Canadian Entomologist and Memoirs of the Entomological Society of Canada) have served as important outlets for taxonomic contributions on arthropods since 1868. A survey of beetle (Coleoptera) publications therein has revealed that 2276 species-group, 136 genus-group, and seven family-group taxa were first described in 492 scientific articles. New beetles were described in 67 families by 165 authors. We document trends of beetle descriptions over time, by taxonomic group and by the origin of the new taxa. We also provide biographical notices of the entomologists who described the new taxa. We believe that The Canadian Entomologist will continue to be coveted as a suitable outlet for taxonomic works in the future.

AllCardiophorusspecies found in Canada and the United States of America east of the Rocky Mountains are keyed and all but those with the majority of their ranges west of the Rocky Mountains are revised. Eleven species are recognized, three of which are new to science (C. catskillensissp. nov.,C. destinensissp. nov., andC. panamapolissp. nov.).Cardiophorus floridaeCandèze andC. angustatusBlanchard are synonymized underC. convexus(Say). All 11 are described and taxonomically important characters are presented. Distribution maps are presented for each species. The following lectotypes are designated for species that were described from more than one specimen without former holotype designation:C. angustatus,C. floridae,C. erythropusErichson,C. gagatesErichson,C. togatusHorn,C. robustusLeConte,C. convexulusLeConte, andC. amictusMelsheimer. The following neotypes were designated to replace destroyed type specimens:C. cardisce(Say) andC. convexus.