Pselaphodes banphabat sp. nov.

(Figs 4A, 5)

Type material (1 specimen). HOLOTYPE: LAOS: BOLIKHAMSAI: ♂, ‘LAOS: 27.iv-1.v.97, 70 km NE Vientiane BAN PHABAT, 150 m, N18°16′, E103°11′, Sausa & Jendek’ (MHNG) .

Diagnosis. Male body length 3.05 mm. Antennomeres 9–11 enlarged and forming club, antennomeres 9 and 10 each with small tubercle at apex and base, respectively. Horn-like metaventral processes long, in lateral view narrowing apically. Protrochanter with tiny ventral spine, mesotrochanter with acute ventral spine; mesofemur with small tooth at middle. Median lobe of aedeagus slightly asymmetrical dorso-ventrally; parameres elongate; endophallus composed of spine-like structures and a single sclerite. Female unknown.

Description. Male (Fig. 4A). Body length 3.05 mm, Head approximately as long as wide, HL 0.59 mm, HW 0.57 mm; eyes prominent, each composed of about 44 facets. Antennomeres 9–11 (Fig. 5A) enlarged and forming distinct club, antennomere 9 with a round tubercle at apex, antennomere 10 with similar but larger tubercle at base. Pronotum (Fig. 5B) as long as wide, PL and PW 0.59 mm, roundly narrowing apically at apical 2/5. Elytra much broader than long, EL 0.83 mm, EW 1.05 mm. Horn-like metaventral processes (Fig. 5C) long, in lateral view narrowing apically. Protrochanter (Fig. 5D) with tiny spine at ventral margin, profemur simple; mesotrochanter (Fig. 5E) with acute ventral spine, mesofemur with small tooth at middle; metatrochanter and metafemur (Fig. 5F) simple. Abdomen broad at base and narrowed posteriorly, AL 0.98 mm, AW 1.05 mm; tergite 1 (IV) longest, about 2.5 times as long as tergite V; sternite 7 (IX) (Fig. 5G) hemi-membranous, semi-ellipse. Aedeagus (Fig. 5H–J) 0.59 mm long; median lobe dorso-ventrally slightly asymmetric; parameres elongate, broadening to near apices, then greatly narrowed at apices, each paramere with one long apical seta; endophallus composed of numerous spine-like structures, one membranous part, and one forked sclerite.

Female. Unknown.

Comparative notes. The new species is quite distinctive in the form of the male antennal clubs, which leads to a ready separation of P. banphabat from all other congeners.

Etymology. The new species is named after the type locality, Ban Phabat. The name is a noun in apposition.

Distribution. Laos: Bolikhamsai.