Wing of male of Thaumalea americana from Stone (1981, fig. 3) Thaumaleidae,
Manual of Nearctic Diptera
, Ottawa, p.351-353, (1981)
[1].

Wing of female of Trichothaumalea pluvialis from Stone (1981, fig. 2) Thaumaleidae,
Manual of Nearctic Diptera
, Ottawa, p.351-353, (1981)
[1].

Wing venation of Thaumaleidae. Terminology based on McAlpine Manual of Nearctic Diptera,
, Ottawa, (1981)
[2]. The image was drawn by Giancarlodessi.