Olethreutes arcuella (Clerck, 1759)

(Figs 2, 7, 12)

Phalaena arcuella Clerck, 1759: pl. 10, fig. 8. TL: Europe.

Phalaena arcuana Linnaeus, 1761: 344 .

Phalaena lambergiana Scopoli, 1763: 234 .

Diagnosis. This species closely resembles four other species: O. captiosana (Falkovitsh), O. oculata Kim, Byun & Bae, O. subtilana (Falkovitsh) and O. palbongensis sp. nov. Kim & Bae. However, it can be distinguished by its male genitalia, which feature two groups of cornuti.

Material examined. [Germany] 1 ♂, Hannover Misb Holz, 16 VI 1907, genitalia slide No. MGCL-1174104; 1 ♀, Bohemia: Bodenbach. Leg. Zimmermann, 20 VII 1938, genitalia slide No. MGCL-1174105.

Distribution. Austria, Bulgaria, Czech Republic, Germany, Romania, Slovenia (Andreas et al. 2011).

Host plant. Larvae feed on dead Betula leaves (Heckford 2011).

Remarks. This species was reported in Korea by Walsingham (1900), but it was corrected later as a misidentification of O. captiosana by Park (1983).