[A karyotypic analysis of 2 species of blackflies in the genus Prosimulium (Diptera: Simuliidae) from the Kola Peninsula and Kamchatka].

Significant karyotypic differences between the triploid (3n = 9) Prosimulium macropygum Lundström and the diploid (2n = 6) P. macropygum ventosum Rubzov have been found. It is suggested to consider the latter taxon as an independent species P. ventosum.