Found 2 items, similar to alder fly.
English → English (WordNet) Definition: alder fly alder fly n : dark-colored insect having predaceous aquatic larvae [syn: alderfly, Sialis lutaria]
English → English (gcide) Definition: Alder fly alderfly \al"der*fly`\, Alder fly \Al"der fly\ 1. Any of numerous dark-colored neuropterous insects of the genus Sialis or allied genera. They have predaceous aquatic larv[ae], which are used for bait. [Webster 1913 Suppl.] 2. (Angling) An artificial fly with brown mottled wings, body of peacock harl, and black legs. [Webster 1913 Suppl.]