(Wilhelmia) Enderlein 1921

Key to species (female) of the subgenus Wilhelmia from China 1. Strings of scutum narrower................................................................. S. (W.) lineatum - Strings of scutum normal............................................................................... 2 2. Scutum with grayish white hairs......................................................................... 3 - Scutum with golden or yellow-white hairs.................................................................. 6 3. Swollen part of genital fork arms with obvious angular inner projections.......................... S. (W.) angustifurca - Swollen part of genital fork arms without angular inner projections.............................................. 4 4. Basitarsus of foreleg about 9 times as long as the width............................................ S. (W.) equinun - Basitarsus of foreleg about 7 times as long as the width....................................................... 5 5. Fore tabia, mid tabia and hind tabia brown and the middle parts yellow; basal 3/4 of hind basitarsus yellow.................................................................................................... S. (W.) zhangyense - Basal 1/4~1/3 of fore tabia and mid tabia yellow; basal 3/5 of hind tibia yellow and the middle part of hind basitarsus yellow............................................................................................ S. (W.) lama 6. Genital fork arms with inner projection.................................................................... 7 - Genital fork arms without inner projection................................................................ 10 7. Basal 2/3 of basitarsus of hindleg yellow................................................................... 8 - A great amount of basitarsus of hindleg yellow.............................................................. 9 8. Genital fork arms with angular inner projection............................................. S. (W.) qingxilingense - Genital fork arms with papillary inner projection............................................... S. (W.) wushiense 9. Mid tabia and hind tibia brown and the middle part yellow........................................ S. (W.) germuense - Fore tabia, mid tabia and hind tabia brown except basal part yellow............................... S. (W.) qinghaiense 10. The length of sensory vesicle 0.25 times that of the third palpomere................................. S. (W.) takahasii - The length of sensory vesicle 0.35~0.55 times that of the third palpomere........................................ 11 11. Genital fork arms with lateral projection.................................................................. 12 - Genital fork arms without lateral projection............................................................... 14 12. Genital fork arms not swollen........................................ S. (W.) xichangense An, Tan & Wang sp. nov. - Genital fork arms swollen............................................................................. 13 13. Swollen part of genital fork arms subquadrate............................................... S. (W.) pseudequinum - Swollen part of genital fork arms subtriangular.................................................. S. (W.) pinnatum 14. Basal 3/5~2/3 of hind basitarsus yellow................................................................... 14 - Basitarsus of hind basitarsus brown, and the middle part yellow................................... S. (W.) xingyiense 15. The upper part of the frons with medium longitudinal groove.................................... S. (W.) veltistshevi - The upper part of the frons without medium longitudinal groove............................................... 15 16. The length of sensory vesicle 0.4~0.55 times that of the third palpomere......................................... 16 - The length of sensory vesicle 0.3 times that of the third palpomere............................................. 17 17. Genital fork arms without inner projection................................................. S. (W.) eurybrachium - Genital fork arms with developed inner projection............................................. S. (W.) pekingense 18. Hind tibia with black ring; genital plate triangular......................................... S. (W.) tongbaishanense - Hind tibia without black ring; genital plate elongated......................................... S. (W.) dunhuangense