Two new subspecies of Alosterna tabacicolor (DeGeer, 1775) (Coleoptera, Cerambycidae) from the Far East of Russia

Alosterna tabacicolor kompantsevi ssp. n. from Kunashir Is. and A. t. toyohara ssp. n. from South Sakhalin Is. are described. Both subspecies are close to A. t. erythropus (Gebler, 1841) and A. t. tenebris Danilevsky, 2012 (both from mainland Asia) as well as to A. t. sachalinensis Danilevsky, 2012 from northern Sakhalin Is. and to A. t. hirayamai Fujita, 2018 from the central of Japanese Honshu Is. The distinguishing characters and color illustrations are proposed.