Nematus japonicus (Takeuchi, 1921)

Kumar, Deepthi S & Sankar, Manimuthu M, 2023, Taxonomic Notes and New Distribution and Host Plant Records for Sawflies and Woodwasps (Hymenoptera, Symphyta) of Japan VIII, Bulletin of the National Museum of Nature and Science. Series A, Zoology 49 (2), pp. 57-74 : 62

Nematus japonicus (Takeuchi, 1921)

Japanese name: Hiraashi-habachi

Material examined. HONSHU: Tochigi Pref.: 3 $, Nakagawa, Yamata, coll. larvae on Alnus sieboldiana 30. IX. 2018 , mat. 2. X., em. 10. IX. 2019, S. Ibuki; 3$, same data but mat. 3. X., em. 14. IX. 2019 .

Host plants. Betulaceae : Alnus firma Siebold et Zucc., A. hirsuta Turcz. var. hirsuta , A. japonica (Thunb.) Steud. , A. inokumae Murai et Kusaka , A. pendula Matsum. ( Okutani, 1967); A. sieboldiana Matsum. (new record).

Remarks. We here record A. sieboldiana as a new host plant. This sawfly is associated with various species of Alnus .