Female external genitalia of six morphospecies in ventral view A type fA, Biasticus taynguyenensis Ha, Truong & Ishikawa, sp. nov., holotype, ♀, HNL2018-073 B type fB, B. griseocapillus Ha, Truong & Ishikawa, sp. nov., holotype, ♀, HNL2018-038 C type fC, B. luteicollis Ha, Truong & Ishikawa, sp. nov., paratype, ♀, HNL2018-024 D type fD, B. flavinotus (Matsumura, 1913), ♀, HNL2018-117 E type fE, B. confusus Hsiao et al., 1979, ♀, VN-Hem-1998-012 F type fF, B. flavus (Distant, 1903), ♀, LA-Redu-2004-006.