Lethrus microbuccis -species group

Diagnosis. Dorsal surface of the mandibles in both sexes with low, not sharp keels (Figs. 3–8), keel on the right mandible less distinct and can be obtuse. Elytral striae indistinct or distinct, but not definitely impressed (Figs. 3–8). Ventrites without denticles; subapical ventrite with tuft of long erect setae, which is denser in females (Figs. 40–43). Dorsal surface of the body usually more or less dull (Figs. 3–8), although metallic tinge can be rather well pronounced (Fig. 5). Parameres anteriorly curved downwards, in lateral view apically appearing roundish or acuminate (Figs. 11–21); sclerotized apex of endophallus not subclavate (Figs. 24–31) and not curved in lateral view (Figs. 26, 31), resembling an anteriorly bilobed subrectangular plate (Figs. 28–30) or elongate (Figs. 24–27), surface more or less finely granular (Figs. 24–31).

Notes. The species group includes all the other five species of the subgenus: L. shakhristanicus, L. nuratavicus, L. microbuccis, L. elisae and L. d yonini A. Shapovalov & Bagaturov, new species .