Wing of male of Ptychoptera quadrifasciata from Alexander (1981, fig. 4) [1].

References

1. Alexander C.P.
   (1981) Ptychopteridae. in: McAlpine J.F. (Ed.), Manual of Nearctic Diptera. Agriculture Canada, Ottawa, pp. 325-328.

Wing of male of Bittacomorpha clavipes from Alexander (1981, fig. 3) [1].

References

1. Alexander C.P.
   (1981) Ptychopteridae. in: McAlpine J.F. (Ed.), Manual of Nearctic Diptera. Agriculture Canada, Ottawa, pp. 325-328.

Wing of male of Bittacomorphella jonesi from Alexander (1981, fig. 2) [1].

References

1. Alexander C.P.
   (1981) Ptychopteridae. in: McAlpine J.F. (Ed.), Manual of Nearctic Diptera. Agriculture Canada, Ottawa, pp. 325-328.

Wing venation of Ptychoptera. Terminology based on McAlpine [1]. The image was drawn by Giancarlodessi.

References

1. McAlpine J.F., et al
   (1981) Manual of Nearctic Diptera. Research Branch, Agriculture Canada, Ottawa.