Cenozoic, Tertiary, Eocene (33.9-55.8 Mya).
Holotype ♀, Smith Ranch, near Cathedral Bluffs, Colorado, USA (compression / impression).
National Museum of Natural History, Simthsonian Instituion, Washington DC, USA.
Edwards (1932) noted that this mosquito is "Perhaps a true Culex".
Fossil Culicidae: Culex winchesteri