Pelthydrus (s. str.) madli Schönmann, 1995 (Figs. 3–4, 6, 7)

Pelthydrus madli Schönmann 1995: 124 –125.

Material Examined: 4exs. (IAECAS): CHINA: Yunnan Province, Ruili City, Dayingjiang National Scenic Area, Moli Management Office, 24°06'N, 98°00'E, 127 m, 18. 10. 2016, leg Wang, Peng & Sun. 2exs. (IAECAS): CHINA: Yunnan Province, Ruili City, Moli First Production Team, 24°07'N, 98°00'E, 127 m, 18. 10. 2016, leg Wang, Peng & Sun.

Diagnosis. This species belongs to the Pelthydrus truncatus species group. Habitus as in Figs. 3–4. BL: 2.90 – 3.05 mm, BW: 1.55 – 1.65 mm. Body elongate oval, dorsally nearly flat, apex of elytra (combined) truncated, surface shiny black. Head rather rectangular; anterior margin of clypeus straight; pronotum trapezoidal, with lateral margins nearly straight. Elytra almost parallel sided along basal 0.35, and then gradually narrowed posteriorly; small ground punctures sparsely distributed. Mesoventrite with apically acute triangular plate and median longitudinal carina; metaventrite with aposterior flask-shaped, flat and smooth glabrous area, whose bottleneck a little short; first sternite with a medial longitudinal carina not reaching posterior margin. Aedeagus (Fig. 6). 0.50 mm long, nearly parallel sided, parameres about 1.1 times as long as phallobase; median lobe wide, gradually narrowing towards rounded apex, gonopore sinuated at distal 1/4; parameres somewhat exceeding median lobe, apical portion slightly pointing towards midline.

Distribution. China: Yunnan (it is recorded from China for the first time), Thailand.

Remarks. A newly generated partial sequences of cytochrome oxidase subunit I (COI) is deposited in GenBank under accession number MG554386.