Allocapnia pygmaea

Allocapnia pygmaea (Burmeister, 1839) Notes Allocapnia pygmaea is commonly known as the Pygmy Snowfly (Stark et al. 2012). This widespread and often abundant species ranges from southeastern Canada west to Iowa and North Dakota and southwest to Missouri and Tennessee (Ross and Ricker 1971, DeWalt et al. 2024). This species inhabits small to medium sized streams, with gravel and rocky substrates that remain cool throughout much of the summer (Ross and Ricker 1971). The larvae apparently diapause in the hyporheic zone of streams during the summer months (Pugsley and Hynes 1985). Adult collection dates for A. pygmaea in New York range from early February through mid-May (Fig. 7). This species has been documented from a wide range of stream sizes and elevations (5-530 m asl, Fig. 9), and is common throughout the state (Fig. 11 e).