Wing of Corethrella from Cook (1981, fig. 3) Chaoboridae,
Manual of Nearctic Diptera
, Ottawa, p.335-339, (1981)
[1].

Wing of Chaoborus americanus from Cook (1981, fig. 2) Chaoboridae,
Manual of Nearctic Diptera
, Ottawa, p.335-339, (1981)
[1].