Stenus sugayai nov.sp. (Figs 11, 18, 19, 59)

Type material: Holotype () and 18, 37 - paratypes: Taiwan: Taichung Hsien: Anmashan, 2600m, 8.IV.2002, H. Sugaya . Paratypes: 2: ibidem, 2650-2750m, 1.V.1990, A. Smetana (T 35); 1, 2: ibidem 2230m, 4.V.1990, idem (T 43); 2, 1: Hsiaohsueh Shan, 2650-2750m, 1.V.1990, idem (T 34) ; 2: Nantou Hsien: Piluchi, 27.III.1986, Y. Shibata. - HT and PTT in coll. Naomi (Kuyshu University), PTT also in cSh, coll. Smetana, cT and in cP .

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

Length: 2.5-3.1mm (forebody: 1.4-1.5mm).

PM of a -PT: HW: 28,8; DE: 15; PW: 21; PL: 22; EW: 26.3; EL: 23; SL: 16.5.

Male: Ventral characters as in S. persubtilis . Aedeagus (figs 18, 19), apical portion of median lobe slightly different (short in single specimens), narrowly rounded at slightly prominent apex, expulsion hooks connected medially; parameres much longer than median lobe, with 8-9 long setae in apical half.

Female: Stenite 8 and Valvifer as in S. persubtilis . Spermatheca (fig. 59), infundibulum more than 3x as long as broad.

In nearly all respects very similar to S. persubtilis, except in the genitalia.

Comparative note: This new species should be identified by the aedeagus.

Etymology: This species is dedicated to its collector, Mr. H. Sugaya.