Since first reported, this species has been redescribed onmany occasions (Alekperov 2005; Borror 1963b; Fenchel1968; Kahl 1931; Ma et al. 2002; Pérez-Uz et al. 1996; Songet al. 2002; Song and Wilbert 2002; Thompson and Kaneshiro1968; Wilbert and Kahan 1981). On the basis of the previousdescriptions as well as the data from Zhanjiang population,an improved diagnosis is added.