Wing of female of Pseudatrichia howdeni from Kelsey (1981, fig. 5) Scenopinidae,
Manual of Nearctic Diptera
, Ottawa, p.525-528, (1981)
[1].

Wing of female of Brevitrichia schlingeri from Kelsey (1981, fig. 4) Scenopinidae,
Manual of Nearctic Diptera
, Ottawa, p.525-528, (1981)
[1].

Wing of male of Scenopinus pecki from Kelsey (1981, fig. 3) Scenopinidae,
Manual of Nearctic Diptera
, Ottawa, p.525-528, (1981)
[1].

Wing of female of Scenopinus fenestralis from Kelsey (1981, fig. 2) Scenopinidae,
Manual of Nearctic Diptera
, Ottawa, p.525-528, (1981)
[1].

Wing venation of Pseudatrichia and Metatrichia. The image was drawn by Giancarlodessi.

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

Wing of Scenopinus. From Comstock (fig. 370) The wings of insects,
, Ithaca, N.Y., (1918)
[2].