CYTOGENETIC AND PHENOTYPIC VARIATION IN C ENTRAL AND PERIPHERAL-POPULATIONS OF THE MALARIA MOSQUITO, ANOPHELES MESSEAE FALL (DIPTERA, CULICIDAE)

Chromosome polymorphism and morphological variation in malaria mosquit o Anopheles messeae larvae of populations from western Siberia, Kyrgyz stan, and southern Kazakhstan were studied. It is shown that the level of inversion polymorphism decreases at the boundary of the range. A s hift in the phenotypic norm observed in the peripheral biotopes is att ributed to direct selection larvae with ''southwestern'' chromosomal v ariants and to modification.