Holomorphology and neotype designation of Microperla retroloba (Wu, 1937).

Microperla retroloba (Wu, 1937) is a poorly described species from Gansu Province of China and the types of which were apparently lost. Herein, a neotype of M. retroloba is designated based on new material from Ningxia Hui Autonomous Region adjacent to Gansu Province. Male, female, larva and egg morphology of M. retroloba are described, illustrated and compared with all congeners.

Description of a remarkable new species of Isoperla (Plecoptera: Perlodidae), with supplements for Isoperla kozlovi Zhiltzova, 1972 from China.

A remarkable new species of Isoperla Banks, 1906, Isoperla chongxui sp. nov. from Henan Province of China is described and illustrated. The new species is characterized by the conspicuous abdominal tergal processes in males. Comparisons are made between the new species and its congeners. New descriptions and illustrations are provided for Isoperla kozlovi Zhiltzova, 1972 from northeastern China. Isoperla fengi Wu Claassen, 1934 and Isoperla curvispina (Wu, 1938) are considered nomen dubia due to lost types and poor original descriptions.