[Change in the autogeny of a Leningrad population of Culex pipiens molestus (Culicidae)].

Eight year observations on the autogeny of C. p. molestus have shown that the per cent of autogenous females decreased from 87% (1968) to 25.6% (1976). The population of C. p. molestus from basement apartments of Leningrad can be expected to receive a replenishment from free-living C. pipiens.