Leptocimbex formosanus group of Leptocimbex Semenov, Cimbicidae is defined and the relationships and characteristics are provided. Two new species of this group are described from Hunan and Yunnan Provinces in China: Leptocimbex shinoharai Yan & Wei sp. nov. and L. naitoi Yan & Wei sp. nov. Redescriptions of the three known species of L. formosanus group (L. formosanus Enslin, L. dendrobii Rohwer and L. nigropropodea Wei & Deng) and a key to all known species of this group are provided. © 2018 The Entomol...