Flanged Bombardier beetles from Shanghai, China, with description of a new species in the genus Eustra Schmidt-Goebel (Coleoptera, Carabidae, Paussinae)

Four paussine species belonging to three different genera are discovered in Shanghai. A new species, Eustra shanghaiensis Song, sp. n., is described, illustrated, and distinguished from the treated congeners. New distributional data or biological notes on Eustra chinensis Bänninger, 1949, Itamus castaneus Schmidt-Goebel, 1846, and Platyrhopalus davidis Fairmaire, 1886 are provided.