2. Uniformus semicircularis Song & Huang, sp. nov. (Figs 16–30)

Measurement. Male, 3.0–3.1mm (including wings).

Description. Color pattern as in Figs 16–21.

Hind wing vein MP+CuA unbranched (Fig. 22). Abdominal apodemes reaching 5th abdominal sternite (Fig. 27). Pygofer side prolonged and narrowed (Fig. 25). In ventral view, subgenital plate with row of macrosetae near middle of lateral margin and row of rigid microsetae from lateral margin to apex (Fig. 24). Paramere long and extended beyond subgenital plate with apex sharply tapered and only slightly curved (Fig. 30). Connective with apical feet distinct (Fig. 26). Aedeagal shaft with a pair of curved and smooth finger-like basal processes ventrally, a lamellate protrusion on apex dorsally; preatrium with pair of apical processes arched and directed toward each other terminally, covered with pore-like indentations on apical 1/3; dorsal apodeme with lamellate protrusion dorsally, both ends curved inward (Figs 28–29).

Material examined. Holotype: ♁, CHINA, Zhejiang Province, Mt. Gutianshan, 13-VII-2021, coll. Juan ZHOU . Paratype: 1♁, same data as holotype.

Notes. The new species is similar to U. inclusus in color pattern, but can be distinguished by the aedeagal shaft with a pair of digitiform processes at the base.

Etymology. The specific epithet is derived from the Latin word “semicircularis”, which refers to the shape of the apical processes of the aedeagal preatrium which are arched and directed to each other terminally.