Permalink : http://hdl.handle.net/2115/86761

The widely distributed tropical species Psyllipsocus yucatan Gurney is recorded from several localities in Thailand. P. yongi New & Lee, previously only known from Peninsular Malaysia, is recorded from Thailand and its male is described for the first time. Four new species are described and illustrated: P. formosus Lienhard & Yoshizawa n. sp. (Peninsular Malaysia), P. sarawakensis Lienhard & Yoshizawa n. sp. (East Malaysia:Sarawak), P. siamensis Lienhard & Yoshizawa n. sp. (Thailand), P. hyalomarginatus Lienhard & Yoshizawa n. sp. (Thailand). A checklist of the 17 species of Psyllipsocus known from the Oriental Region is provided. The name of the Chinese species P. maculatus Li Fasheng, a junior homonym of the American P. maculatus Garcia Aldrete, is replaced by the new name P. apicosectus Lienhard & Yoshizawa n. nom.