Calamotropha doii Sasaki, 1997

(Figs 9, 35, 56)

Calamotropha doii Sasaki, 1997: 346 . TL: Japan. TD: NMNS.

Material examined. Tianjin: 1♁, Guhai'an and Wetland Nature Reserve, 1.VII.2021, leg. MJ Qi et al., slide No. KYN21197 ; 1♀, Dahuangpu (39.44°N, 117.26°E), HH Li et al., slide No. KYN20882.

Diagnosis. Adult (Fig. 9) wingspan 21.0– 33.5 mm. Calamotropha doii is similar to C. paludella Hübner, 1824 in genitalia. It can be distinguished by the valva distinctly concave at distal 2/5 on the ventral margin (Fig. 35); in the female genitalia by the corpus bursae having one subrounded signum (Fig. 56). In C. paludella, the valva is straight on the ventral margin (Fig. 43), and the corpus bursae has one fan-like signum (Fig. 63).

Distribution. China (Beijing, Hebei, Tianjin), Japan.