Batricavus abdominalis Yin, Zi-Wei & Li-Zhen Li 2012

Male. Length 1.50–1.59; body (Fig. 1A) reddish brown, maxillary palpi and tarsi lighter. Head slightly wider than long, HL 0.34–0.35, HW 0.39–0.41. Eyes each composed of about 20 large facets. Antennal club three-segmented, segment VIII smallest, IX–XI enlarged. Pronotum rounded laterally, slightly wider than long, PL 0.38–0.40, PW 0.42–0.46. Elytra wider than long, EL 0.53–0.57, EW 0.61–0.63, with scattered long setae. Protibiae simple; metafemora broadened mesally at apical 1/4 (Fig. 2B). Abdomen much narrower than elytra, AL 0.25–0.27, AW 0.53–0.55; tergite IV (Fig. 2A) with large median cavity comprising complicated structure. Aedeagus (Figs 2C, D) length 0.20, well-sclerotized, with elongate dorsal lobe. Female. Measurements: BL 1.54–1.60, HL 0.33–0.34, HW 0.40–0.41, PL 0.37–0.38, PW 0.41–0.43, EL 0.50–0.53, EW 0.60–0.63, AL 0.34–0.35, AW 0.56–0.58. Generally similar to male; eyes smaller, each composed of about 15 facets; tergite VIII (Fig. 2E) with smooth posterior margin; genital complex (Fig. 2F) transverse, width 0.24, well sclerotized.

South China: Hainan.