Stenus perrarus nov.sp. (Figs 39, 64)

Type material: Holotype () and 3 - paratypes: Taiwan: Taoyuan Hsien: Takuanshan Forest, 1650m, 17.IV.1990, A. Smetana (T 5). Paratypes: 2, 1: Taipeh Hsien: Fushan, 27.IV.1999, H. Sugaya.- HT and PTT in coll. Smetana (Ottawa), PTT also in cN and in cP.

Description: About as in S. perturbator nov.sp.

Length: 2.5-3.1mm (forebody: 1.3-1.4mm).

PM of the HT: HW: 28.8; DE: 15; PW: 21.5; PL: 23.5; EW: 27.8; EL: 23; SL: 16.

Male: Ventral characters as in S. persimplex nov.sp., but the apical emargination of sternite 8 less deep and broader (LS: ED= 51:3). Aedeagus (fig. 39), apical portion of median lobe very short, convexely narrowed, apex narrowly rounded, expulsion hooks not contiguous medially; parameres much longer than median lobe, with 9-10 apical setae.

Female: Sternite 8 at posterior margin obtusely angled triangular, apex nearly acute. Valvifer as in S. perturbator . Spermatheca (fig. 64), infundibulum at least 3x as long as broad.

In many respects very similar to S. persubtilis, but the median portion of frons less elevated, the elytral punctation slightly coarser, the abdominal punctation slightly less dense, interstices on last tergites distinctly larger than punctures.

Comparative notes: This new species resembles extremely S. persimplex nov.sp., but the head is slightly less broad, the sexual characters are different. For identification see key.

Etymology: Since I only saw few specimens I name this new species " perrarus " (Lat.= very rare).