1. Body stouter; head with only the posterior supraorbital setae present; right mandible tridentate; pronotum with 2 pairs of lateral setae; hind pronotal angles obtuse; elytra with lateral margin distinctly serrate in basal 1/3; 3 rd elytral stria with 2 dorsal pores; scutellar stria present............... L. nishikawai
1′. Body more slender; head with only anterior supraorbital setae present; right mandible bidentate; pronotum with only the anterior pair of lateral setae, the posterior pair absent; hind pronotal angles nearly rectangular; elytra with lateral margins smooth, not serrate; 3 rd elytral stria with only 1 dorsal pore; scutellar stria absent............. L. duanensis, new species