Wing of female of Xylophagus abdominalis from James (1981, fig. 3) Xylophagidae,
Manual of Nearctic Diptera
, Ottawa, p.489-492, (1981)
[1].

Wing of female of Rachicerus obscuripennis from James (1981, fig. 2) Xylophagidae,
Manual of Nearctic Diptera
, Ottawa, p.489-492, (1981)
[1].

Wing venation of Xylophagidae. The image was drawn by Giancarlodessi.

Wing venation of Rachicerus. The image was drawn by Giancarlodessi.