Stenus persimplex nov.sp. (Figs 6, 37, 63)

Type material: Holotype () and 6, 3 - paratypes: Taiwan: Ilan Hsien: Shan-Mi Lake, 24 o 22’43’’N, 121 o 44’12’’E, 1100m, 10.V.1995, A. Smetana (T 177) . Paratypes: 1: ibidem, 1120m, 9.V.1995, idem (T 174); 1: ibidem, 1110m, 10.V.1995, idem (T 185).- HT and PTT in coll. Smetana (Ottawa), PTT also in cP .

Description:Asin S. perturbator nov.sp.

Length: 2.3-3.0mm (forebody: 1.3-1.4mm).

PM of the HT: HW: 26.8; DE: 13.5; PW: 19.8; PL: 20; EW: 24; EL: 19; SL: 14.

Male: Metasternum shallowly impressed, moderately coarsely, densely punctate. Sternites 3-5 simple, sternite 6 with finer and denser punctation and pubescence medially, sternite 7 slightly shallowed in posterior middle, medial punctation and pubescence fine and very dense. Sternite 8 with a moderately broad apical emargination (fig. 6). Sternite 9 with long apicolateral teeth. Aedeagus (fig. 37), apical portion of median lobe short, triangularly narrowed, apex rounded, expulsion hooks contiguous medially; parameres much longer than median lobe, with about 7-9 apical setae.

Female: Sternite 8 and Valvifer as in S. persubtilis . Spermatheca (fig. 63), infundibulum about 3x as long as broad.

In most respects very similar to S. persubtilis, but the median portion of frons less elevated, the elytral punctation slightly coarser, the abdominal punctation distinctly sparser, interstices mostly distinctly larger than diameter of punctures.

Comparative notes: This species also should be identified by the genitalia; see also the key.

Etymology: This species has no very remarkable characters, therefore I name it " persimplex " (Lat.= very simple.