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 ) dolichocephalus Morawitz, 1876 Hylaeus dolichocephalus Morawitz, 1876 : 271 –272, ♀, ♂ (lectotype: ♀, designated by Dathe 1986b : 28 , “Iskander” [Tajikistan], ZISP); Chen & Xu 2009 : 47 (Xinjiang); Proshchalykin & Dathe 2012 : 12 (Xinjiang); Dathe & Proshchalykin 2016 : 360 (Xinjiang); 2017: 17; Proshchalykin 2017b : 260 (NW China). Prosopis plurifasciata Alfken, 1931 : 824 –826, ♀ , ♂ ( type locality: “ Jaman-Tal , Djol-Boeruljuk ” [ Tajikistan ], MNHU ). Prosopis ( Prosopis ) heliaca Warncke, 1992 : 791 , ♀ , ♂ ( type locality: Bitlis ; Icel ; Kars ; Van ; Hakkari , Turkey , OLBL ). Material examined. CHINA . 1 ♀ , 3 ♂ , Bоmуn (Iсhegуn) River , NE Тsаidаm , Gоbi , VI.1895 , V . Rоbоrоvskу , Р. Kozlov ; 1 ♂ , Iche Lake , Orogyn Lake , N Tsaidam , Central Gobi , 1-3.VII.1895 , V . Roborovsky, P . Kozlov ; 2 ♀ , 10 ♂ , Dankhe River , S to Sachzhou, Gashunskoe Gobi, 24-27.VII.1895 ; 1 ♂, idem, 28.VII.1995 ; 1 ♂, idem, 1- 3.VIII.1895 ; 2 ♂ , 4.VIII.1895 , V. Roborovsky , P. Kozlov. Distribution. Тurkeу, Afghаnistаn , Таjikistаn , Kаzаkhstаn , Russiа (Sоuth Siberiа), Mоngоliа , Chinа (* Gаnsu , * Qinghаi , Хinjiаng).