The correct author and date for the family-group name Heriadini (Hymenoptera: Megachilidae: Megachilinae) are discussed. A brief discussion of available family-group names associated with Osmiini Newman, 1834 is provided.

Stenodrilus (Coleoptera: Omethidae: Telegeusinae) is a monotypic genus, with its single species described from Chiapas, Mexico. Two new species of the genus are described from Honduras, Stenodrilus howdenorum Roza new species and Stenodrilus megalocephalus Roza new species. These are the first records of the family in the country and the first records of the genus in Central America. The new species are diagnosed, described, and illustrated, and a distributional map and identification key for the species of Stenodrilus are provided. The morphology of the genus is discussed in the subfamilial framework.

Allocapnia pygmaea Burmeister (Plecoptera: Capniidae) is a winter-active stonefly in North America. Despite the adult’s winter emergence, little is documented about the insect’s cold tolerance and cryoprotective biochemistry. To better understand the cold tolerance of this winter-active stonefly, we collected adult A. pygmaea in Antigonish, Nova Scotia, Canada, during March or April in both 2023 and 2024. Following different cold exposures, we measured the lower limits of activity (–9.3 °C) and the temperature at which internal freezing occurs (–11.9 °C), and we confirmed that A. pygmaea could survive subzero temperatures unless they froze. In control (field-collected) and cold-shocked stoneflies, we assayed the following putative cryoprotectants: proline, glycerol, myo-inositol, trehalose, and glucose. We detected little effect of cold shock on most cryoprotectants, except for the polyols glycerol and myo-inositol, which decreased in concentration following cold shock. These findings improve our current understanding of Capniid cold tolerance, confirm that A. pygmaea uses a freeze-avoidant strategy, and lay a foundation for future studies on how these insects may use cryoprotectants for winter activity.

The European praying mantis, Mantis religiosa (Linnaeus, 1758) (Mantodea: Mantidae), is an introduced predatory insect established in southwestern and southeastern Canada and much of the United States of America. Despite over a century of records, the geographic origins of North American populations have remained unclear. We analysed 807-bp fragments of the mitochondrial CO1 gene from 17 sequences from southern Quebec and Ontario, Canada, comparing them to 175 sequences from western, eastern, and southern Europe. Population genetics analyses revealed that Canadian samples carry haplotypes from two divergent lineages that co-occur in a localised region of western France. These haplotypes showed the closest affinities to others also found in France, strongly supporting a French origin. Historical records from Rochester, New York, United States of America, where M. religiosa was first documented in 1899, suggest introduction via the 19th-century horticultural trade. The low haplotype diversity in Canada may reflect founder effects or environmental filtering, though additional, undetected introductions remain possible. This study clarifies the likely French source of M. religiosa in southeastern Canada and underscores the value of combining molecular data and historical accounts to track invasion pathways.

Several Monochamus species (Coleoptera: Cerambycidae) use monochamol as an aggregation-sex pheromone, raising questions about how they maintain reproductive isolation. Herbivorous insects use host plant semiochemicals as cues for mate location and, with or without habitat cues, these could confer reproductive isolation among sympatric Monochamus spp. To test this hypothesis, host and habitat preferences in mate location were examined for sympatric populations of Monochamus maculosus, Monochamus notatus, and Monochamus scutellatus in the Algoma District, Ontario, Canada. Field experiments were performed to investigate whether differences in host preference, vertical distribution across the forest canopy, spatial distribution within down and standing dead trees, or any combination of these factors could minimise cross-attraction to monochamol. Results showed that more M. maculosus were attracted to monochamol combined with jack pine foliage than with balsam fir or white spruce, whereas no differences in host attractivity were observed for the other species. Vertical abundance of M. maculosus and M. scutellatus was similar across forests. Spatial distribution provided limited evidence for species segregation within hosts. No evidence was found that host or habitat preferences contribute to reproductive isolation in M. maculosus, M. notatus, or M. scutellatus, suggesting that vertical distribution could be driven by resource availability.