Key to the species of Herminia decipiens complex

1a. Third segment of male labial palpus 1/2 of second segment (figs 1, 3).......................... H. amamioshima sp. n. 1b. Third segment of male labial palpus shorter than 1/2 of second segment (figs 2, 4–6)................................ 2 2a. Third segment of male labial palpus 1/3 of second segment (figs 2, 4)................................... H. terminalis 2b. Third segment of male labial palpus less than 1/6 of second segment (figs 5, 6).................................... 3 3a. Coecum penis not broadened, ductus bursae with a small protuberance at base (figs 42, 45–50)............... H. decipiens 3b. Coecum penis broadened, ductus bursae without a small protuberance at base (figs 43, 44)........................... 4

4a. Papillae anales and 8 th segment moderate, sclerotized portion smaller in joint of ductus and cervix bursae (fig. 43)................................................................................................. H. yuksam sp. n.

4b. Papillae anales and 8 th segment slender, sclerotized portion larger in joint of ductus and cervix bursae (fig. 44)................................................................................................... H. borneo sp. n.