Wing of male of Periscelis annulata from McAlpine (1981, fig. 3) Periscelididae,Manual of Nearctic Diptera
, Ottawa, p.895-898, (1981).
Wing venation of Cyamops. The image was drawn by Giancarlodessi.
Wing venation of Periscelis. The image was drawn by Giancarlodessi.
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