Cyphochilus tricolor Waterhouse, 1867

Figs 11, 12, 56-58

Cyphochilus tricolor Waterhouse, 1867: 142 .

Cyphochilus vestitus Sharp, 1876: 82 . new synonym

C. tricolor type material examined: Lectotype by present designation: BMNH; 1 ♂; SIAM: // C. tricolor, Waterh. Type (H) // Siam (H) // Type (P on white with red border) // Bowring. 63’47* (P on white) //. (Fig. 12).

C. vestitus type material examined: Holotype: MNHN; 1 ♂; // Cyphochilus vestitus / Cambodia Type / D. S. (H on red) // Camb (H) / Mouhot (P) // Ex Musaeo / D. Sharp 1890 (P on white) // Muséum Paris / Coll. R. Oberthur (P on white) // Typus (H on red) //. (Fig. 11).

Additional material examined: 2 specimens.

CAMBODIA: MSNG; 1 ♂; Cambodia .

LAOS: ISNB; 1 ♂; Takek; ex coll. Le Moult.

Description of the lectotype male: Size – BL: 13.5 mm, BW: 5.8 mm, BWX: 7.5 mm, situated at midpoint of elytra. Color – Integument light brown; dorsal surface with scales densely aggregated along sides of pronotum and margins of elytra; scales are white on discus, ochre on head, sides of pronotum and of elytra and yellowish on the margins of elytra. Head – CW/L: 3.2; clypeus largely rounded; (F/O: 5.7); antennal club slightly shorter than antennomeres 2-7 (A2-7/CL: 1.1). Pronotum – (PnW/L: 2); apical angles and lateral margins flattened, apical angles right and protuberant; basal lateral margins straight, basal angles obtuse. Elytra – Without any visible striae. Thoracic sterna – Surface with short, white pubescence and scales; mesosternum feebly developed (MstL: 0.45 mm) however visible between mesocoxae in lateral view. Abdomen – Sternites with uniformly sparse scales; pygidium convex with apical margin narrowly reflected. Legs – Protibia tridentate with basal tooth vestigial; slender apical tooth as long as the middle tooth. Aedeagus – Parameres strongly asymmetric with 5 appendices (Figs 56-58).

Variability: BL: 13-14.5 mm.

Females: Unknown.

Type locality: The type locality given on the labels of the lectotype is “ Siam ”, an old geographical name referable to the territories of Thailand and Cambodia.

Distribution: This species is known from three specimens with generic collection data: Thailand, Cambodia and Laos, the most precise locality being Thakhek in Laos at the border with Thailand (17°24’N 104°48’E).

Remarks: Although it seems that Waterhouse described C. tricolor on a single specimen this is unfortunately not explicitly stated. Therefore, I prefer to designate the only available type specimen as the lectotype. Cyphochilus vestitus Sharp was explicitly described based on a single specimen, which is hence the holotype. The comparison of these types shows that C. vestitus is a junior synonym of C. tricolor . The species can be readily separated from all other congeners by the unique conformation of the strongly asymmetric parameres with five appendices (Figs 56-58).