[Dynamics of populations in an urban and underground resting place of Culex pipiens L. (Diptera, Culicidae) (author's transl)].
An urban and underground resting place of Culex pipiens has been examinated during one year. Many females (28% in September, 70% in January) do not find sexual partners. The cause is a mixing of autogenous and anautogenous forms in the place even if it seems perfectly closed.