Ypsolopha saitoi Moriuti, 1964

(Figs 39, 88, 139, 184)

Ypsolophus saitoi Moriuti, 1964: 205 .

Ypsolopha saitoi Moriuti: Moriuti, 1977: 102; Moriuti, 1982: 211; Sohn et al., 2010: 35. Type locality: Japan (Honsyû).

Adult (Fig. 39): Wing expanse 18.0−21.0 mm. Forewing with CuA1 and CuA2 separated (Fig. 88).

Material examined. 2 ♂♂, 1 ♀, Feng County (33°55′ N, 106°31′ E), Shaanxi Province, 1600 m, 13.vii.1988, coll. Houhun Li; 6 ♂♂, 2 ♀♀, Tianshui (34°37′ N, 105°42′ E), Gansu Province, 11−13.viii.1988, coll. Xingyu Wu.

Distribution. China (Gansu, Shaanxi), Japan.

Diagnosis. This species is similar to Y. umbrina sp. nov., but can be distinguished by the forewing having a white streak extending from the base to the distal 1/5 of the costa and lacking the dot on the fold (Fig. 39), the arched uncus in the male genitalia (Fig. 139), and the Y-shaped lamella postvaginalis in the female genitalia (Fig. 184). In Y. umbrina sp. nov., the forewing has a white streak extending from the base to the 1/2 length of the costa and bears a black dot at middle of the fold (Fig. 40), the male uncus is subulate (Fig. 140), and the female lamella postvaginalis is U-shaped (Fig. 185).

Remarks. This species is recorded for the first time in China.