H. True Flies:

Without jointed legs, sometimes they don't have a distinct head. Some common stream true flies are Black Flies, Snipe Flies, Midges, Deer and Horse Flies, and Crane Flies.

Common Families and genera of aquatic fly larvae 
   Tipulidae  (Crane Flies)   4
   Chaoboridae                8
   Chironomidae (Midges)
   Simulidae  (Black Flies)   6
   Tabanidae  (Horse Flies)   7

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