Two new species of centipedes, Lithobius keelungensis sp. nov. and Lithobius (Monotarsobius) qingquanensis sp. nov., from Taiwan (Chilopoda, Lithobiomorpha, Lithobiidae)

Male secondary sexual characters are diverse in Taiwanese Lithobius. We describe two new species with their male secondary sexual characters, Lithobius (Ezembius) keelungensis sp. nov. and Lithobius (Monotarsobius) qingquanensis sp. nov.. In L. (E.) keelungensis, male 14–15^th femora and tibiae are markedly thick, the femora have a deep furrow on each dorsal surfaces, and the tibiae are oval, with a wide shallow excavation on each dorsal surfaces. In L. (M.) qingquanensis, a small wart-like outgrowth bearing about 15 slightly curved setae is present on the dorsoposterior surface of the male 15^th femur.