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alder fly

British  

noun

  1. any of various neuropterous insects of the widely distributed group Sialoidea, such as Sialis lutaria, that have large broad-based hind wings, produce aquatic larvae, and occur near water

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

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It is on the water a good part of the season, and can be used when other flies with this shape wing are about, such as the alder fly, cinnamon fly, etc.

From Project Gutenberg