Siobla ferox (Smith, 1874)

Japanese name: O-koshiaka-habachi

Material examined. HONSHU: Tochigi Pref.: 3 ♂, Nakagawa, Ouchi, 36°44'N 140°14'E, coll. larva on Ampelopsis glandulosa var. heterophylla 22. VI. 2021 , mat. 15–22. VII., em. 27. IV. 2022, S. Ibuki; 1 ♂, same data but mat. 20. VII., em. 29. IV. 2022; 1♂, same data but 22. VII., em. 1. V. 2022 .

Host plant. Vitaceae: Ampelopsis glandulosa (Wall.) Momiy. var. heterophylla (Thunb.) Momiy. (new record). For more records, see Hara et al. (2021).

Remarks. Siobla ferox is a polyphagous sawfly previously known to feed on six species of five families of plants (Hara et al., 2021). This is the first record of Vitaceae and Ampelopsis glandulosa var. heterophylla as the host of S. ferox .