Two new species of Psen Latreille, 1796 (Hymenoptera, Apoidea, Crabronidae) from China, with a key to Psen species of China

Abstract

Two new species of the genus Psen Latreille, 1796, namely Psen fronistriatus sp. nov. and Psen scabrosus sp. nov. are described and illustrated from China. A key to the Chinese species of Psen is also provided.