Genus Stethorus Weise, 1885

Scymnus (Stethorus) Weise, 1885: 65 .

Stethorus Weise, 1899: 64 .– Kapur, 1948: 297. Type species: Coccinella? minima Rossi, 1794: 89 (= Stethorus punctillum (Weise, 1891)), by subsequent designation of Korschefsky, 1931.

Nephopullus Brèthes, 1925: 167 .–Synonymized by Kapur, 1948: 300. Type species: Nephopullus darwini Brèthes, by subsequent designation of Korschefsky, 1931.

Stethorus (Allostethorus) Iablokoff-Khnzorian, 1972: 120 . Type species: Stethorus (Allostethorus) amurensis Iablokoff-Khnzorian, 1972, by original designation.

Diagnosis. Externally similar to Parastethorus and differs mainly by the complete abdominal postcoxal lines and the male genitalia. There are two subgenera in Stethorus . The subgenus Allostethorus can be distinguished from the subgenus Stethorus by the short penis, stout penis guide, and tegminal strut longer than penis guide. The subgenus Stethorus is characterized by a slender penis, somewhat elongate penis guide with the tegminal strut shorter than penis guide.