Adelius clandestinus (Foerster, 1851)

Figs 2A, C

Acoelius clandestinus Foerster 1851: 33 .

Acaelius clandestinus: Shenefelt 1973: 671.

Adelius clandestinus: Belokobylskij 1988: 151; 1998: 557; Yu et al. 2016; Lee et al. 2020: 27.

Material examined. Korea: Gangwon-do, Cheorwon, Geunnam, Yukdan, 13.VI.1992 (Deokseo Ku), 1 male (SMNE) (Lee et al. 2020); Gyeongsangnam-do, Sancheong-gun, 30 km NNW of Jinju, forest, bush, 800 m, 10.VII.2002 (S. Belokobylskij), 1 female (ZISP) .

Hosts. Ectoedemia louisella (Sircom), E. septembrella (Stainton), E. sericopeza (Zeller), Stigmella obliquella (Heinemann) ( Nepticulidae) ( Lepidoptera).

Distribution. Korean Peninsula; Europe, Kazakhstan Russia (Far East).

Remarks. The species was already recorded in the fauna of Korean Peninsula, but on the basis of male only (Lee et al. 2020). Because of the distinct sexual dimorphism in Adelius species, especially in the shape of antennal flagellomeres, the record of female is especially valuable. Current determination of the female of A. clandestinus justifies the presence of this species in the fauna of Korea.