Tachyusa harbinica Pa, 2006

Pa ṡnik, Grzegorz, 2006, A revision of the World species of the genus Tachyusa Erichson, 1837 (Coleoptera, Staphylinidae: Aleocharinae), Zootaxa 1146, pp. 1-152 : 124-126

Tachyusa harbinica Pa ś nik, sp. n. ( Figs. 126–128)

Type material. Holotype: ♂: N. China, Heilungkiang , Harbin, 24.V.1966, P. M. Hammond ( BMNH) ; Paratypes: 2♂♂: same data as the holotype ( BMNH) ; 3♂♂ and 2♀♀: labelled as the holotype, except: 21.V.1966 ( BMNH and ISEA) ; 2♀♀: labelled as the holotype except: 14.VI.1966 ( BMNH) ; 2♂♂ and 1♀♀: Russland [ Russia]: Primorie (S3/4), Ussuri Schutzgebiet [Ussuriyskiy Nature Reserve], Kordon Peischula, 13–20.VIII.1998, J. Sundukow ( MSPC) ; ♂ and ♀: Russland: Primorie (S3/4), Ussuri Schutzgebiet, Kordon Peischula, 13–20.VIII.1998, J. Sundukow ( ISEA) .

Description. Body. Length 2.8–3.2 mm, convex, parallel­sided, glossy; body colour black; elytra pitchy brown, legs reddish brown, antennae brown with antennomeres 1–3 yellowish red.

Head circular in outline, convex, glossy, narrower than pronotum, widest across eyes; eyes large, moderately protruding from lateral contours of head, length of each seen from above subequal to that of postocular region; surface of head with fine isodiametric mesh microsculpture; puncturation fine and dense; pubescence short and moderately dense, directed inward. Antennae short, clearly increasing in width apically, antennomere 3 shorter than 2, antennomeres 4–7 longer than wide, antennomeres 8–10 sexually dimorphic, quadrate in male and transverse in female, antennomere 11 nearly conical.

Pronotum quadrate, moderately convex, glossy, widest in apical third, lateral sides rounded in front, gradually narrowed in straight line to obtuse hind angles; before base with small and shallow transverse impression; surface with fine isodiametric mesh microsculpture; puncturation fine, dense and asperate; pubescence at midline directed posteriorly.

Elytra subquadrate, slightly wider than pronotum, lateral sides arcuate, at suture as long as pronotal length at midline; surface lacking microsculpture; puncturation fine, dense and asperate.

Abdomen parallel­sided, bases of tergites 3–5 each with deep transverse impression, impressions with 7–8 longitudinal ridges, tergal puncturation fine and moderately dense, punctures moderately small and well visible, tergite 8 with isodiametric mesh microsculpture; pubescence relatively long and moderately dense, semirecumbent.

Male. Aedeagus as in Figs. 126–127.

Female. Spermatheca as in Fig. 128.

Remarks. See under T. concinna .

Etymology. The name harbinica refers to the type locality.

Distribution. The new species is known so far only from China and the Russian Far East.