alderfly

A member of any one of the sixty-six {{l|en|species}} of the ''{{l|mul|Sialidae}}'' family of {{l|en|megalopteran}} insects, each {{l|en|specimen}} of which has a body length not exceeding one {{l|en|inch}} and possesses long {{l|en|filamentous}} {{l|en|antenna|antennae}} and four large dark wings.