Ypsolopha contractella (Caradja, 1920)

(Figs 33, 83, 133, 179)

Cerostoma contractella Caradja, 1920: 94 .

Ypsolopha contractella (Caradja): Beccaloni et al. 2003 [accessed 9 January 2012]; Sohn et al., 2010: 29. Type locality: Russia (Kazakevichevo).

Adult (Fig. 33): Wing expanse 20.0−24.0 mm. Wing venation as illustrated (Fig. 83).

Material examined. 1 ♂, Mt. Xinglong, Yuzhong County (35°53′ N, 104°06′ E), Gansu Province, 2178 m, 21.viii.2007, coll. Feng Yang & Hanguang Gao; 1 ♂, 1 ♀, Halawu (33°50′ N, 105°50′ E), Inner Mongolia Autonomous Region, 2200 m, 9.viii.2011, coll. Lixia Li & Yinghui Mu; 40 ♂♂, 11 ♀♀, Erdao (43°21′ N, 125°39′ E), Jilin Province, 760−1010 m, 1–5.viii.2004, coll. Aihuan Zhang; 1 ♀, Erdaobaihe (42°36′ N, 128°10′ E), Jilin Province, 730 m, 3.viii.2004, coll. Zhijie Wang; 2 ♂♂, Laotudingzi, Huanren County (41°15′ N, 125°21′ E), Liaoning Province, 8−9.viii.2009, coll. Weichun Li & Jiayu Liu; 1 ♀, Mt. Baiyun, Haicheng (40°51′ N, 122°43′ E), Liaoning Province, 4.vii.2010, coll. Jiayu Liu & Yanpeng Cai; Mt. Liupan (35°42′ N, 106°11′ E), Ningxia Hui Autonomous Region: 1 ♂, 1900 m, 30.vi.2007, coll. Xinpu Wang; 1 ♂, 2 ♀♀, 1700 m, 1–2.vii.2008, coll. Shulian Hao & Zhiwei Zhang; 1 ♂, Dongxia (36°56′ N, 101°40′ E), Qinghai Province, 19.viii.1991; 1 ♂, Mt. Li, Jincheng (35°30′ N, 112°51′ E), Shanxi Province, 1520 m, 16.viii.2006, coll. Xu Zhang & Haiyan Bai.

Distribution. China (Gansu, Inner Mongolia, Jilin, Liaoning, Ningxian, Qinghai, Shanxi), Japan, Korea, Russia.

Diagnosis. This species is characterized by the forewing having a white crescent-shaped spot at the lower angle of the cell, the large broadened valva in the male genitalia (Fig. 133), and the ovate signum with one ridge in the female genitalia (Fig. 179). Ypsolopha contractella is similar to Y. cristata Moriuti in the male genitalia, but differs in the inception of the ductus ejacuiatorius placed near the base of the phallus (Fig. 133), which is at 1/3 length of the phallus in the latter species (Moriuti 1977: Fig. 232).