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.