In the footsteps of history: the bees of the genus Hylaeus Fabricius (Hymenoptera, Apoidea: Colletidae) collected by V. I. Roborovsky and P. K. Kozlov in Northwest China (1895 - 1926) Author Yu, Maхim Author Daтhe, Holger H. text Zootaxa 2018 2018-06-18 4434 3 573 588 journal article 29867 10.11646/zootaxa.4434.3.11 9821a4a5-b192-48ac-a98a-86241400cb02 1175-5326 1292263 096CAD80-4176-4C2E-AEEE-7D4B5B991479 Hylaeus ( Hylaeus ) przewalskyi Morawitz, 1887 Hylaeus przewalskyi Morawitz, 1887: 227 –229, ♀, ♂ (lectotype: ♂, designated by Dathe 1986a : 283 , Oasis Nia [China, Kunlunshan], ZISP); Dathe 1986a : 284 (Xinjiang); Chen & Xu 2009 : 48 (Qinghai, Sichuan); Dathe & Proshchalykin 2016 : 371 (China); 2017: 33 (China). Material examined. CHINA . 2 ♀ , oasis Sachzhou, Gashunskoe Gobi, 1-3.VIII.1895 , V . Roborovsky, P . Kozlov ; 36 ♀ , 6 ♂ , Shibendu , Shiguiza , N to Sachzhou, Gashunskoe Gobi, 9-12.VIII.1895 , V . Roborovsky, P . Kozlov ; 16 ♀ , 4 ♂ , Shiguza , Bugas River , S Khami , Gashun' Gobi , 19.VIII.1895 , V . Roborovsky, P . Kozlov ; 1 ♂ , Bugas , near Khami , 20.VIII.1895 ; 7 ♀, 25 ♂, idem, 28.VIII.1895 ; 1 ♀, 31 ♂, idem, 30.VIII.1895 ; 14 ♀, 43 ♂, idem, 1.IX.1895 ; 1 ♀, 16 ♂, idem, 2.IX.1895 ; 27 ♀, 17 ♂, idem, 3-5.IX.1895 ; 31 ♀, 26 ♂, idem, 6.IX.1895 ; 4 ♀, 2 ♂, idem, 7.IX.1895 ; 26 ♀, 13 ♂, idem, 8.IX.1895 ; 28 ♀, 12 ♂, idem, 10.IX.1895 , V. Roborovsky, P . Kozlov ; 2 ♀ , 1 ♂ , Etszin-gоl , N Alаshаn' , Gоbi , 25.V–10.VI.1909 , Р. Kоzlоv. Distribution. Kаzаkhstаn , Mоngоliа , Chinа (* Gаnsu , * Inner Mоngоliа , Qinghаi , Siсhuаn, Хinjiаng).