Arocatus nanus (Breddin, 1900)

(Figs. 19, 26–27, 32–36)

Microcaenocoris nanus Breddin, 1900: 171 . Lectotype (Gaedike 1971: 118): ♂, [Indonesia:] Sumbawa; SDEI. Arocatus aurantium Zou & Zheng in Zheng & Zou (1981: 17) . Holotype: ♀, China: Yunnan, Xishuangbanna, Ganlanba; IZAS (examined). Synonymized by Gao et al. (2013: 693).

A bibliography was provided by Gao et al. (2013: 693).

Material examined. TAIWAN. Hsinchu Co.: Maopu, 1.x.1981, leg. T.C. Hsu (1 ♂ NTU) ; Miaoli Co.: Taian, 16.vii.1980, leg. Y.I. Chu (1 ♂ NTU) ; Nantou Co.: Sungkang, 2100 m, x.1985, Malaise trap, leg. K.S. Lin (1 ♂ TARI) ; Pingtung Co.: Koshun [= Hengchun], 19.xi.1932, leg. R. Takahashi (1 ♀ NTU).

Diagnosis. This species is readily recognized within the genus Arocatus by its almost uniformly red dorsum lacking contrasting dark markings (Figs. 26–27). It was thoroughly redescribed and illustrated by Deckert (1991) and Gao et al. (2013).

External male genitalia. Genital capsule (Fig. 32) with dense, short, semierect and adpressed hairs all over its surface and scattered, long, erect hairs ventrally; lateral extension of ventral rim provided with a pair of hook-like lateral protrusions surrounding paramere sockets dorsally; cuplike sclerite (Fig. 32: cs) with a distinct longitudinal ridge fused with ventral rim. Paramere as in Figs. 33–36. Phallus (Fig. 19) with a losely wrinkled helicoid complex, two coils of penisfilum continued in a long, transparent filament distally which is somewhat longer than half of penisfilum.

Distribution. India (Tamil Nadu); Cambodia; Thailand; Laos; China (Yunnan, Hainan); Indonesia (Sumbawa) (Gao et al. 2013); Taiwan (new record).