Paracapnia angulata Hanson 1961

Paracapnia angulata Hanson, 1961 Notes This species is commonly known as the Angulate Snowfly (Stark et al. 2012). Paracapnia angulata is widely distributed throughout North America ranging from Newfoundland-Labrador west to Saskatchewan, south along the Appalachian Mountains to north Georgia, and southwest across the Midwestern USA to Colorado and Wyoming (Stark and Baumann 2004, DeWalt et al. 2024). Prior to Hanson (1961), some historical records of P. opis and Capnia vernalis (Newport, 1848) are referable to this species. Harper and Hynes (1972) reported a synchronous emergence of P. angulata in mid-April and direct hatching of the eggs in May, with first instar larvae initially appearing in mid-June. Myers et al. (2011) reported this species from all four watersheds draining the Adirondack Park. In New York, adult collection dates extend from mid-February through early June (Fig. 7). This species has been collected commonly from streams at 34-561 m asl (Fig. 9) throughout the state (Fig. 12 e).