Abstract
Two new species of the genus Lindenius (Crabronidae) from Kazakhstan are described in the article: Lindenius jakushkini Kazenas, sp. n. (South-Eastern Kazakhstan) and Lindenius gvozdevi Kazenas, sp. n. (Southern Kazakhstan and Northern Uzbekistan). Data on places of storage of types, the differential diagnosis and name etymology are resulted. Both species concern to the group of species having deep lateral incisions of the clypeus, almost reaching eyes. Lindenius jakushkini sp. n. is closest to S. subaeneus Lepeletier et Brullé, 1835 and L. affinis Kazenas, 1973. From the first species it differs by not compressed pygidial plate of a female, from the second by almost direct fore margin of a clypeus (between lateral corners), the wide and pointed lateral teeth of a clypeus and widely rounded pigidial field of a male. Lindenius gvozdevi sp. n. differs from all closely related species having deep lateral incisions of the clypeus by a pair of slightly flattened transverse nodosities on the pronotum