A new species and two new records of the Neoperla diehli subgroup of the N. montivaga group (Plecoptera: Perlidae) from China

A new species of the Neoperla diehli subgroup of the montivaga group, N. curvilobata sp. nov., is described from Guangxi Zhuang Autonomous Region of southern China. The first country records for N. diehli Sivec, 1985 and N. hubleyi Stark Sivec, 2008 from China are given. Neoperla wui Yang Yang, 1990 is reported again from the type locality. Neoperla mesostyla Li Wang, 2013 (in Wang et al. 2013b) is placed as a synonym of N. wui. Illustrations and color images are provided for each species and the new species is compared with related congeners of the N. diehli subgroup. A provisional key to the known species of the N. diehli subgroup is also presented.