Hover-flies (Diptera: Syrphidae) of the Bolshoi Khekhtsir Ridge, Khabarovskii krai, Russia Author Mutin, V. A. Author Barkalov, A. V. text Far Eastern Entomologist 2018 2018-01-29 349 17 27 http://dx.doi.org/10.25221/fee.349.3 journal article 10.25221/fee.349.3 2713-2196 7164059 C72424E3-F419-4D22-9B34-909A5944B154 Betasyrphus nipponensis (van der Goot, 1964) MATERIAL. IV – 2. VI 2015 , 2♀ (M) ; VII – 30. VIII 2007 , – 1♀ (D) ; VIII – 4.IX 2007, 1♂ (D); IX – 27-28.VIII 2007, – 1♀ (D).