Thrinchostoma Saussure, little known bee genus from China, with description of a new species (Hymenoptera: Halictidae) Author Zeqing Niu Author Feng Yuan Author Pia Oremek Author Feng Liu Author Chaodong Zhu text Zoological Systematics 2016 41 2 207 215 journal article 39063 10.11865/zs.201619 5f3e5610-2abc-453d-9e36-14d693ef2eb6 399740 urn:lsid:zoobank.org:pub:36D293B8-D83C-4E82-A8FF-A1C71663E3B0 Thrinchostoma ( T. ) sladeni Cockerell, 1913 New record to China ( Figs 1–16 ) Thrinchostoma sladeni Cockerell, 1913 : 35 , ♂ (non. ♀). Type locality: India , Assam, Khasia Hills. Halictus wroughtoni Bingham, 1897 (nec Cameron , 1897): 432, ♂, ♀, not examined. Halictus ( Rostratilapis ) sladeni Friese 1914 : 27 , ♂ (non. ♀). Thrinchostoma sladeni Cockerell : Sladen, 1915 : 213, ♂; Blüthgen, 1926 : 377, ♂, ♀. Thrinchostoma ( T. ) sladeni Cockerell : Michener, 1978 : 524 (list); Michener & Engel, 2010 : 133 (list), 131, ♀ (key), 133, ♂ (key); Saini & Rathor, 2012 : 164 (list). Diagnosis. All specimens collected from China bear the following characters: the male malar area nearly as long as the width of mandible base ( Fig. 3 ), metafemur, metatibia strongly swollen, and metatrochanter ventrally with angular projection ( Fig. 6 ), basal margin of S5 with two transverse rows of spines numbered in 3 respectively at both sides ( Fig. 5 ); the female malar area about one-third as long as the width of mandible base ( Fig. 13 ), second marginal crossvein angulated medially ( Fig. 14 ), metasomal terga with short, simple, laterally-directed hairs on posterior marginal zones, T2 with broad orange apical margin ( Fig. 15 ). All these characters diagnosed our specimens as T . ( T .) sladeni Cockerell, 1913 . Figures 11–16. Thrinchostoma ( T. ) sladeni Cockerell, 1913 , female. 11. Habitus, lateral view. 12. Head, frontal view. 13. Head, lateral view. 14. Fore wing, dorsal view, showing second submarginal crossvein angulated medially. 15. Metasoma, dorsal view, showing T1–2. 16. Hind tibia, showing the inner tibial spur. Scale bars =1 mm. Materials examined. China , Yunnan, Xishuangbanna, NWNR : Naban ( 100º40′E , 22º09′N ), 1♀ 1♂ , 12.V.2008 , 1♀, 729 m , 6.IV.2009 , 2♀, 709 m , 26.IV.2009 , 1♀, 732 m , 26.V.2009 , coll. Lingzeng Meng; 2♀, 729 m , 2♀, 732 m , 23.V.2008 , 2♀, 729 m , 6.VI.2008 , 1♀ 1♂ , 709 m , 15.VI.2008 , 1♀, 729 m , 28.VI.2008 , 3♀, 732 m , 18.VII.2008 , coll. A. Weigel; Mandian ( 100º40′E , 22º07′N ), 1♀, 753 m , 6.VI.2008 , 1♀, 753 m , 15.VI.2008 , 2♀, 28.VI.2008 , 2♀, 753m , 8.VII.2008 , coll. A. Weigel; 2♀, 753 m , 16.III.2009 , 2♀, 753 m , 6.IV.2009 , 1♀, 746 m , 16.IV.2009 , 2♀, 746 m , 6.V.2009 , 4♀, 753 m , 16.V.2009 , 4♀, 753 m , 6.VI.2009 , 2♀, 2♂ , 26.VI.2009 , coll. Lingzeng Meng; Anma Xinzai ( 100º39′E , 22º12′N ), 4♀, 772 m , 6.IV.2009 , 1♀, 772 m , 26.V.2009 , coll. Lingzeng Meng; 1♀, 13.VI.2013 , coll. Pia Oremek; Danuoyou ( 100º38′E , 22º12′N ), 1♀, 770 m , 26.V.2009 , coll. Lingzeng Meng; 1♀, 1.V.2013 , 1♀, 10.VII.2013 , coll. Pia Oremek; Jinhong Mekong Hill Garden ( 100º47′E , 22º01′N ), 1♀, 30.XII.2007 , coll. A. Weigel; Banggang Xinzai ( 100º15′E , 22º09′N ), 1♀, 12.V.2008 , coll. Lingzeng Meng; Manfei ( 100º40′E , 22º08′N ), 1♀, 14.V.2013 , 1♀, 29.VI.2013 , coll. Pia Oremek; Xiaomangmu ( 100º28′E , 22º00′N ), 1♂ , 29.V.1987 , ( Alpinia sp.), coll. Tao Zhu; Juzidi ( 100º37′E , 22º13′N ), 1♀, 30.IV.2013 , 1♂ , 11.VI.2013 , 1♀, 25.VI.2013 , coll. Pia Oremek; China , Yunnan, Xishuangbanna, Mile Xian, Bubang ( 103º14′E , 24º07′N ), 1♂ , 700 m , 16.IX.1993 , coll. Huanli Xu. Distribution. China (Yunnan), India (Assam, Khasia Hills; Cockerell, 1913 ). Figures 17–22. Thrinchostoma ( T. ) yunnanense Niu & Zhu , sp. nov. , male. 17. Habitus, lateral view. 18. Head, frontal view. 19. Head, lateral view. 20. Metasoma, dorsal view, showing T1–2. 21. Metasoma, ventral view. 22. Hind leg, lateral view, showing the trochanter, femur and tibia. Scale bars =1 mm. Floral association. Alpinia sp. (Zingberaceae). Remark. This species was previously only recorded from India in literature. It is a newly recorded species for China .