Deltote nemorum (Oberthür, 1880)

(Figs 3, 13, 19)

Erastria nemorum Oberthür, 1880, Études d’Entomologie 5: 82, pl. 4: 2 (Type-locality: Russia: Primorye, Askold I.). Synonymy: Erastria africana Leech, 1889, nec Felder & Rogenhofer, 1874.

Material examined. 1 male, Chongshan, Helong, Prov. Jilin, 14.vii.2001 (H.L. Han); 1 male, Weidong, Fusong, Prov. Jilin, 16.vii.2001 (H.L. Han); 2 males, 1 female, Jiashan, Helong, Prov. Jilin, 20.vii.2001 (H.L. Han); 1 female, Yongxin, Longjing, Prov. Jilin, 3.viii.2002 (D.Y. Jin); 3 males, 1 female, Jingbo lake, Ningan, Prov. Heilongjiang, 17.vii.1983 (S.Y. Fang) [NEFU]; 1 male, 1 female, Russia, Primorye terr., Kedrovaya Pad res. 14–16.vi.1976 (V. Kononenko) [IBSS]; 1 male, Japan, Honshu, Karuizawa, 24.vi.1952 (P. Savolainen) [FMNH]; genitalia prep. male N. China, HHL- 1167-1; female N China, VK 17/05.

Bionomics. Meso-hygrophilous species, inhabits meadows, open wet forest, clearings, wet wood edges, bushes along rivers. Bivoltine, the moth flies from VI to VIII in two generations. The larva and its foodplants are unknown.

Distribution. Manchurian, nemoral. China (Provinces Heilongjiang, Jilin, Xinjiang, Shanxi).— Russia Far East (Amur, South of Khabarovsk and Primorye terr.), Korea, Japan.