Isotomidae of Japan and the Asiatic part of Russia. I. Folsomia 'inoculata ' group

The paper considers blind species of the genus having two pairs of macrosetae on both meso- and metathorax and united in so-called ' ' group, which is given a new, more laconic definition. Morphological characters important in the group's taxonomy are discussed and a further division into four subgroups is proposed. Eight new species, i.e., Potapov & Kuznetsova, , Potapov & Kuznetsova, , Potapov, , Potapov & Hasegawa, , Potapov & Kuznetsova, , Potapov, , Potapov, , and Potapov & Babenko, , are described. Uchida & Tamura and Stach are redescribed basing on new material, for the latter species the Stach's individuals were also examined. A key to species of the group is given.