Siamites sabahensis sp. n. (Figs 19–24) Type material. Holotype: E MALAYSIA (Sabah): ♂, two labels: “ SABAH: Poring Hot / Spring, 500 m / 7.V.1987 / Burckhardt - Löbl” [white, printed]; “ SIAMITES / sabahensis m. / det. P. Jałoszyński, 2020 / HOLOTYPUS ” [red, printed] (MHNG). Diagnosis. Male macrophthalmous; head with four separate tufts of bristles evenly distributed along posterior margin of vertex; aedeagus with large distal plate strongly constricted at base and with a pair of apical hooks. Description. Body of male (Fig. 19) moderately convex and moderately slender, uniformly light brown, covered with yellowish vestiture. BL 0.93 mm. Head (Fig. 20) broadest at large, strongly convex and coarsely faceted eyes, HL 0.13 mm, HW 0.18 mm; tem- pora in dorsal view slightly shorter than eyes; vertex with indistinct posteromedian impression, strongly transverse; frons confluent with vertex, with shallow median impression between weakly elevated supraantennal tubercles. Punctures on vertex obscured by bristles, those on frons fine, inconspicuous. Vestiture of head dorsum (Fig. 20) composed of four separate tufts of dense and relatively short bristles evenly distributed along posterior margin of vertex, outer tufts slightly larger than inner pair; long and thick sparse bristles directed posterodorsad and situated slightly in front of posterior tufts; and sparse, suberect setae on frons. Antennae short, with moderately strongly broadened, indistinctly delimited tetramerous club, AnL 0.38 mm; scape and pedicel strongly elongate; antennomeres III–VII each about as long as broad, VIII–X each strongly transverse, XI distinctly shorter than IX–X com- bined, narrower than X, almost as long as broad. Pronotum subconical with broad anterior margin, broadest near posterior third; PL 0.25 mm, PW 0.25 mm. All margins weakly and evenly rounded; lateral carinae barely discernible, blunt, marked in posterior third of pronotum; base with transverse groove distinctly deepened at each end. Punctures on pronotum fine and sparse, ...