8. Stenaptinus sumatrensis Fedorenko, sp.n.

Figs 4, 14, 52, 54, 56, 70, 73, 108–109.

MATERIAL. Holotype ♂ (ZMMU) labeled ‘ Sumatra, Barat Province, Maninjau vill., 00°17´09´´N / 100°13´54´´E, h= 498 m, 18– 19.XII.2014, leg. I. Melnik’. See also ‘comments’ to S. fimbriatus .

DIAGNOSIS. No differences from melanistic specimens of S. fimbriatus, except that aedeagus is distinctive and elytra shorter.

DESCRIPTION. Macropterous species (Fig. 73, 108– 109). BL 16 mm. Head pale, with a U-shaped patch on vertex which is parallel-sided and merged into black neck. Pronotum black, each side with a small, somewhat vague oblong spot almost reaching lateral margin. Elytra black, each with pale pattern consisting of a small humeral spot, a very narrow, vague, zigzag patch spanning ridges 5 to 7, extreme apical margin, and apices of elytral ridges just in front. Dorsum glabrous, except for a few setules behing supra-ocular seta, very sparse pilosity at pronotal base and apex, and individual setules scattered over elytral disc; this latter also with rather dense yet nearly imperceptible microscopic ciliae.

Pronotum as wide as long, broadest just in front of middle, slightly convex at basal margin and sinuate at apex; sides subsinuate a fifth from base. Base slightly wider than apex; lateral bead and groove very fine, almost obliterate in front of basal angles; these very slightly obtuse and slightly blunted.

Abdomen (Figs 4, 14): tergite VII finely and rather unevenly punctate, with larger punctures small and fine punctures missing here and there.

Aedeagus (Figs 52, 54) as for S. dongnaiensis sp.n., except for internal sac having the body larger and proximal basal bulb barely divided into two, indistinctly projecting laterad and thence invisible in dorsal view.

Female genitalia and reproductive tract (Figs 56, 70) as for S. fimbriatus, except that gonocoxite IX is slightly shorter and wider.

GEOGRAPHIC DISTRIBUTION. Known from the type locality only.

NAME. Topotypic.

HABITATS AND HABITS. No data.

COMMENTS. The holotype is hardly different from melanistic specimens of S. fimbriatus (those with infuscated neck), but aedeagus is very similar to that of S. dongnaiensis sp.n. This suggests that S. sumatrensis sp.n. and S. dongnaiensis sp.n. may only be subspecies of one species and allows me to provisionally identify a female specimen from Java (100 km of Djakarta, Mt. Pangrango, 1000 m, 9– 14.X.1999, A.V. Gorokhov leg., ZISP) as sumatrensis sp.n., with reservation that it may be S. fimbriatus . This female (Figs 4, 14, 56, 70, 109) has the tergite VII with apical setae less strongly curved at apices and the gonocoxite IX slightly shorter and wider than in female S. fimbriatus .