is a specific kind of: insect.

is a broader term that covers: ant lion, antlion, antlion fly | lacewing, lacewing fly | Corydalus cornutus, dobson, dobson fly, dobsonfly | fish-fly, fish fly | alder fly, alderfly, Sialis lutaria | snakefly | mantispid | spongefly, spongillafly.

is a member of: Neuroptera, order Neuroptera.