adult body length 14-25 mm; common species usually >20 mm
Adults large (body usually 20 mm or more); forewings gray, brown, or yellowish-brown, sometimes with specks, patches, or other markings. Specific characters:
ocelli (simple eyes) present
no wing hairs clubbed--character shared with some other families (1)
maxillary palps 4-segmented in males, 5-segmented in females
front tibia has 2 or more spurs, middle tibia has 4
Images showing these characteristics of the adult:
Larval cases typically long, spiral-shaped or ring-shaped, constructed from grass stems, sometimes with small pebbles.
most of North America; species diversity greatest in northeastern states and eastern Canada
Larvae usually found in cold lakes and marshes, some live in flowing water.
larva and case
of undetermined Phryganeidae (Jason Neuswanger, New York, troutnut.com)