Wing of female of Pyrgota undata from Steyskal (1981, fig. 4) Pyrgotidae,
Manual of Nearctic Diptera
, Ottawa, p.813-816, (1981)
[1].

Wing of male of Pyrgotella chagnoni from Steyskal (1981, fig. 3) Pyrgotidae,
Manual of Nearctic Diptera
, Ottawa, p.813-816, (1981)
[1].

Wing of female of Sphecomyiella valida from Steyskal (1981, fig. 2) Pyrgotidae,
Manual of Nearctic Diptera
, Ottawa, p.813-816, (1981)
[1].