Based on the material kept at the Smithsonian Institution, Washington, D. C., seven new species of Strepsiptera, Mengenilla orientalis, Stichotrema ceylonense, S. ambiguum, S. krombeini, S. simile, S. minor and Tridactylophagus ceylonensis, are described from Sri Lanka. A species of Paraxenos is also recorded. All of these genera, i. e., Mengenilla, Stichotrema, Paraxenos and Tridactylophagus, are recorded from Sri Lanka for the first time.
Nine new species of the genus Stylops (Strepsiptera : Stylopidae) are described from 10 species of the Japanese Andrena (Hymenoptera : Andrenidae). Those are : S. japonicus sp. n. from A. (Andrena) benefica, S. truncatus sp. n. from A. (A.) maukensis, S. oblonguhs sp. n. from A. (A.) Zongitibialis, S. truncatoides sp. n. from A. (A.) shirozui, S. circularis sp. n. from A. (Gymnandrena) sasakii, S. yamatonis sp. n. from A. (Simandrena) yamato, S. kaguyae sp. n. from A. (Mcrandrena) kaguya and A. (M.) minutula, S. borealis sp. n. from A. (Taeniandrena) ezoensis, and S. valerianae sp. n. from A. (Holandrena) valeriana. All of these are described from females excepting only S. borealis which is known by both sexes.
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