Eteoryctis picrasmae Kumata & Kuroko, 1988, In: Kumata et al., 1988b: 28. TL: Japan. TD: HUJ.

Diagnosis. The species resembles E. deversa (Meyrick, 1922) in both forewing pattern and the genitalia, but can be separated from the latter by the phallus without any cornutus in the male genitalia and the corpus bursae without any distinct signum in the female genitalia. In E. deversa, the phallus has 10 to 30 cornuti near apex and the corpus bursae has 20 to 30 small signa encircling its middle (Kumata et al., 1988a).

Description. Adult. Wingspan 6.0–8.0 mm. Head and thorax bright white. Maxillary palpus and labial palpus white, sometimes with dark brown scales on outer surface. Antennae light brown, scape black dorsally, flagellum dark brown dorsally. Legs white, with black dot or rings; fore femur with white long scales on inner surface. Tegula brown. Forewing brown, with basal 3/4 of dorsal half white, tinged brown on dorsum; a white stripe obliqued outward at costal 3/4, sometimes inlaid with black scales; costa near apex interconnected with white and black spots which extending to cilia; cilia on dorsum light brown. Hindwing and cilia brown.

Male genitalia. Tegumen somewhat parallel-sided, with two tufts of long setae on both sides of middle part. Tuba analis with a short linear sclerotization. Valva gradually widened towards apex, rounded apically, densely covered with setae. Saccus almost parallel-sided on distal half, rounded apically. Phallus slender, about as long as tegumen + vinculum + saccus. Eighth abdominal segment with dorsal apodeme slender.

Female genitalia. Papilla analis short, with setae arranged in lines. Apophysis anteriores as long as posteriores. Ostium bursae funnel-shaped. Antrum short and sclerotized. Ductus bursae membranous, narrow at base, somewhat parallel-sided towards bursae, with spinules distally, a strong sclerotization near corpus bursae. Corpus bursae ovate, membranous, with basal 2/5 densely covered with micro spines.

Material examined. Shandong: 1♂ 3♀, Mt. Kunyu, Yantai, 37.292°N, 121.740°E, 400 m, 2017.VII.17, leaf mines collected on Picrasma quassioides, pupated VII.18, emerged VII.30, VIII.1, leg. Tengteng Liu & Zhenquan Gao, genitalia slide nos. LIU0034 ♂, JYR17049 ♀, JYR17053 ♀, registration nos. SDNU. YT170704.1 − 4; 1♀, Mt. Laoshan, Qingdao, 36.211°N, 120.605°E, 600 m, 2018.VII.02, leaf mines collected on Picrasma quassioides, leg. Tengteng Liu, registration nos. SDNU. Ent 001219.

Host plant. Picrasma quassioides (D. Don) Benn. (Simaroubaceae).

Distribution. China (Shandong), Japan (Kumata et al., 1988b).

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