[New species of mosquito, Aedes (Stegomyia) sibiricus sp. n. (Culicidae)].

The description of female, male and 4th stage larva of a new species of mosquito, Aedes (Stegomyia) sibiricus, from Siberia and Far East of the USSR is given. This species belonging to the albopictus subgroup of the scutellaris group of species was formerly confused with A. (S.) galloisi Yam. The geographical distribution of A. sibiricus is related to the south of the East taiga and Okhotsk districts of the Euro-Siberian province of the Circumboreal subregion of the Palearctic, while A. galloisi is spread in the Chinese-Himalayan subregion and has been recorded in the Soviet Union from the Sakhalin Island only (the geographical distribution of this species is shown on a map).