Figure above :  Wing-venation of a number of representatives of the family Blephariceridae (Nematocera).
      Reading from left to right and from top to bottom :
      59 -- Edwardsina  stigmatica EDW.
      60 -- Paulianina  hova ALEX.
      61 -- Bibiocephala  grandis O.S..
      62 -- Bibiocephala  doanei KELL.
      63 -- Blepharocera  fasciata WESTW.
      64 -- Hapalothrix  lugubris Lw.
      65 -- Apistomyia  elegans BIG.
      66 -- Hammatorrhina  bella Lw.
(From HENNIG, 1954)

The first picture -- Edwardsina (59) -- might be seen as representing the venational groundplan of the family Blephariceridae. Every other wing (60-66) can, in one or another way, be derived from the venation of Edwardsina.