Definitions for "Stonefly"
Family of aquatic insects commonly imitated in flyfishing. Many species are found in western streams.
Aquatic macroinvertebrate; order Plecoptera; nymphs have three pair of legs, a pair of antennae, and two long tail filaments; typically found on or near stones in the stream; sensitive to pollution. image
primitive winged insect with a flattened body; used as bait by fishermen; aquatic gilled larvae are carnivorous and live beneath stones