Rugilus (Rugilus) gansuensis ROUGEMONT 1998

(Map 1)

Material examined China: Shaanxi 11♀♀ [partly teneral], SW Meixian, Qinling Shan, 34°02'N, 107°24'E, 1870 m, N-slope, secondary deciduous forest, near stream, litter and grass sifted, 26.VII.2012, leg. Assing & Schülke (cAss, cSch). Gansu: 3♂♂, 13♀♀ [partly teneral], N Chengxian, W-Qinling Shan, 34°08N, 105°47'E, 1750 m, moist valley with stream and ponds, meadow with Artemisia, 28.VII.2012, leg. Assing & Schülke (cAss, cSch); 2♂♂, 3♀♀ [partly teneral], N Chengxian, W-Qinling Shan, 34°08'N, 105°47'E, 1760 m, N-slope, secondary deciduous forest margin, sifted, 28.VII.2012, leg. Assing & Schülke (cAss, cSch) ; 1♀ [teneral], N Chengxian, W-Qinling Shan, 34°08'N, 105°47'E, 1760 m, heap of rotting bamboo, sifted, 28.VII.2012, leg. Assing (cAss) ; 4♂♂, 19♀♀ [partly teneral], N Chengxian, W-Qinling Shan, 34°10'N, 105°43'E, 1850 m, mixed secondary forest margin, litter sifted, 29.VII.2012, leg. Assing, Schülke & Wrase (cAss, cSch) ; 6♂♂, 12♀♀ [partly teneral], N Chengxian, W-Qinling Shan, 34°10'N, 105°42'E, 1830 m, stream valley with secondary deciduous forest, moist litter sifted, 29.VII.2012, leg. Assing, Schülke & Wrase (cAss, cSch) ; 1♂, 6♀♀ [partly teneral], N Chengxian, W-Qinling Shan, 34°10'N, 105°42'E, 1830 m, stream valley with secondary deciduous forest, moist litter sifted, 29.VII.2012, leg. Assing (cAss) ; 4♂♂, 5♀♀ [partly teneral], mountains SE Longnan, 33°11'N, 105°14'E, 2060 m, N-slope with scree, shrub litter and moss sifted, 7.VIII.2012, leg. Assing & Wrase (cAss, cSch); 1♀ [teneral], mountains SE Longnan, 33°11'N, 105°14'E, 2060 m, N-slope with scree, nest of Formica chinensis sifted, 7.VIII.2012, leg. Assing (cAss).

Comment Rugilus gansuensis is widespread in the Qinling Shan westwards to the Bailong river (Map 1), its distribution parapatrically bordering on that of R. confluens . Previous records from the Daba Shan (ASSING 2012a) are exclusively based on females and require confirmation. The species is subject to a pronounced sexual wingdimorphism; males are macropterous, females micropterous. The sex ratio is strongly biased in favour of females. Only 31 (15.6 %) in a total of 199 specimens examined so far are males. Several of the above specimens are teneral (end of July, beginning of August).