Field data and observations were obtained on the seasonal biology and ecology of Argynnis coronis simaetha in central Washington during 2013–24. Host plants, Viola trinervata, at a shrub-steppe site near Yakima produced new growth in late February–early March that hosted overwintered first instar larvae of A. coronis. Larvae and pupae completed development to adulthood in an estimated 56–86 days. Development was enhanced by ground micro-habitat temperatures 0.7–3.3 °C above ambient produced by heliothermic warming on 57–84 % of days during development. Adults eclosed from late April to late May and remained in the shrub-steppe for 4–6 weeks, with males nectaring primarily on Western Giant Hyssop, Agastache occidentalis. Females kept a low profile by being inactive and/or migrating westward to higher elevations soon after eclosion. Males joined the migration westward in mid-late June and both sexes were observed migrating along forest roads at 795–1740 m. Both sexes nectared in flowery mountain meadows and on ridges (2000–2200 m) in the Cascade Mountains during July–August with males more flight-active than females. During 2021–24, A. coronis males were found on nine occasions in the Olympic Mountains more than 200 km from the shrub-steppe. Both sexes migrated downslope eastward from the Cascades in mid-late August with predominantly females reaching the shrub-steppe in the last week of August and early September. A butterfly tagged in the Cascades in July 2015 was sighted 65 km to the east in Yakima in September. Returned populations in the shrub-steppe nectared on Rabbitbrush and oviposited during September–October with the last butterflies seen in mid-late October, 18–23 weeks after eclosion.

Moths (Order Lepidoptera) are a diverse and ecologically important group, and there is much to learn about their distribution and status in northeastern North America. Moth biogeography in Maine is not well understood, especially among offshore islands. The objective of this study was to document species diversity and phenology on Metinic Island, Knox County, Maine (Maine Coastal Islands National Wildlife Refuge). Handmade bucket light traps were deployed in forested and graminoid habitats from 13 May 2023 to 26 July 2023 during 13 sampling events. Moths were photographed and carefully released. Capture totals included 687 individuals from 124 species representing 17 families. Species richness and abundance peaked in early July. One notable species was the Slender Clearwing (Hemaris gracilis), a Species of Greatest Conservation Need (SGCN) in Maine. A better understanding of Maine's coastal moth diversity can help inform habitat conservation and management decisions.

Stiriinae as presently circumscribed include two tribes, the Annaphilini and nominate Stiriini, that have radiated over the American West and Mexico, where more than 90% of the global species diversity is believed to be endemic. Here we provide life history information for 56 species of Stiriini that occur north of Mexico—40 are figured for the first time. For each species, we provide a brief summary of the known distribution north of Mexico, its seasonal phenology, known larval hosts, and diagnostic features. Images of a penultimate or last instar are provided for all but one species. Additionally, we include a brief characterization of Stiriini larval morphology, summarize common elements of Stiriini larval biologies, and identify 16 species that might be worthy conservation targets.

Pelochrista gibsoni, sp. n. and Pelochrista sanjuanensis, sp. n. are described from northwestern Colorado and southeastern Utah, respectively. Included is an updated account of Pelochrista heinrichi (McDunnough).

Niditinea striolella (Lepidoptera: Tineidae: Tineinae) is commonly regarded as an indoor pest of clothes. However, since N. striolella is rarely collected in the field, detailed biology of the species has been unknown. Individuals of N. striolella were from 161 nests of several animal species in Hokkaido, Japan, from 2022 to 2023. As a result, N. striolella was newly recorded from the nest of the Siberian flying squirrel Pteromys volans orii, the small Japanese field mouse Apodemus argenteus, and the white-throated needletail Hirundapus caudacutus. Furthermore, it was gained that new bionomic findings of N. striolella about larval food resource, pupation site, drought tolerance, and adult mating and oviposition behavior.