Two new species, Baetis (Fallceon) candidus sp.n., and B. (Labiobaeits) mustus sp.n. collected from Taiwan, and their nymphs are described herein. Furthermore, 2 subgenera of this genus, Margobaetis Kang and Yang and Mullerbaetis Kang and Yang should be suppressed as synonyms of Fallceon Waltz and McCafferty and Labiobaetis Novikova and Kluge, respectively.
本文描述分布於台灣的四節蜉蝣科(Baetidae)兩新種Baetis (Fallceon) candidus sp.n.,及B. (Labiobaeits) mustus sp.n.,此兩新的描述是根據其稚蟲的特徵。另外,四節蜉蝣屬中的兩亞屬Margobaetis Kang and Yang及Mullerbaetis Kang and Yang分別為Fallceon Waltz and McCafferty及Labiobaetis Novikova and Kluge的新異名。