Periclista erythrogramma Togashi, 1999

Japanese name: Naragashiwa-maru-habachi

(Fig. 6A–B)

Material examined. HONSHU: Tochigi Pref.: 1♀, Nakagawa, Wami, coll. larva on Q. serrata 19. V. 2011 , mat. 22. V., em. 10. IV. 2012, S. Ibuki (Fig. 6A–B) (cited by Naito, 2020); 1 ♀, same data but, Wami, 36°47'N 140°10'E, coll. larva 3. V. 2021, mat. 5. V., em. 27. III. 2022.

Larva. Final feeding-instar (Fig. 6A–B): Yellow green almost entirely; spines white; bifurcate spines apically pale gray, but those on dorsum of thorax apically black; bifurcate spines relatively long, about 1/4 as long as height of trunk; subspiracular lobe with two simple spines; surpedal lobe with two simple spines.

Host plant. Fagaceae: Q. aliena Blume (Yoshida, 2014a), Q. crispula (Shinohara and Hara, 2020), Q. serrata (new record).

Remarks. Although the female specimen examined differs from the original description in having an entirely black mesepisternum, we regard the color difference as an intraspecific variation. The larva observed by us (Fig. 6A) is similar to the larva of P. erythrogramma figured by Yoshida (2014a, fig. 4). We here record a new host ( Q. serrata) for this species.