Species of the genus Lamachus Fórster (Hymenoptera, Ichneumonidae) parasitizing Diprionid sawflies (Hymenoptera, Diprionidae) with descriptions of two new species and a key to Chinese species

Abstract

Four species of the genus Lamachus Forster 1869 belonging to the tribe Mesoleiini of the subfamily Ctenopelmatinae (Hymenoptera, Ichneumonidae) are reported from China. Two of them are new to science, L. nigrus Li, Sheng & Sun, sp. n. and L. rufiabdominalis Li, Sheng & Sun, sp. n. were reared from Neodiprion huizeensisYJao & Zhou, in Guizhou Province of the Oriental part of China. The biology of L. rufiabdominalis is described. A key to the species of Lamachus known from China is provided. © Tao Li et al.