Ocydromus australis; Print; Bembidion; Bembidion is the largest genus of beetles in the family Carabidae by number of species.All species are small (less than 7.5 mm) and move very fast. Most of them live close to water.The genus has a biantitropical distribution; meaning they are found in both the Northern and Southern Hemispheres; but not in the tropics. In warmer regions it is substituted by closely related Tachys and other genera.; 1786-1789