noun (plural alderflies)
A brownish fly-like insect that lives near water and has predatory aquatic larvae.
- Family Sialidae, order Neuroptera: several genera.
- Larvae of alderflies differ from hellgrammites in that they lack the two hooks at the end of the abdomen.
- This is a very small order of Australian insects commonly known as alderflies and dobsonflies.
- The alderfly larvae, known to all and coveted by fish and anglers alike, is the hellgrammite.
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