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A new species of the perlodid genus, Isoperla Banks, I. sejila sp. nov., is described and illustrated from the Tibet Autonomous Region of southeastern China. The everted aedeagus of the male is described and the relationships with other species of this genus known from China are discussed.

A new species of Capniidae, Eucapnopsis yunnana sp. nov., is described and illustrated from Yunnan Province, southwestern China. The relationships with other similar species of the genus are discussed.