Ypsolopha acerella Ponomarenko, Sohn et Zinchenko, 2011

(Figs 19, 70, 119, 167)

Ypsolopha acerella Ponomarenko, Sohn et Zinchenko, 2011: 21 .

Type locality: Korea (Gyonggi; Gangwon), Rusia (Primorskii krai, Far East).

Adult (Fig. 19): Wing expanse 23.0−25.0 mm. Forewing with R4 and R5 separated (Fig. 70).

Material examined. 3 ♂♂, 2 ♀♀, Mt. Liupan (35°42′ N, 106°11′ E), Ningxia Hui Autonomous Region, 1900 m, 27.vi.2008, coll. Shulian Hao & Zhiwei Zhang, genitalia slide No. JQ08021♂.

Diagnosis. This species is characterized by the forewing having a rectangular black patch of erect scales beyond middle of the dorsum (Fig. 19). Ypsolopha acerella is similar to Y. yangi Ponomarenko et Sohn superficially, but can be separated by the forewing without rows of ocherous brown scales on the distal 2/3. Ypsolopha acerella is also similar to Y. parallela (Caradja) in the male genitalia, but can be distinguished by the slender coecum that is about 1/3 length of the phallus (Fig. 119), which is 1/6 length of the phallus in the latter (Fig. 112). The female genitalia of this species are characterized by the specific lamella postvaginalis being a long band with rounded posterior margin (Fig. 167).

Host plant. Sapindaceae: Acer ginnala Maxim. (Ponomarenko et al. 2011) .

Distribution. China (Ningxia), Korea, Russia (Far East).

Remarks. This species is newly recorded for China.