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 Syrphus torvus Osten-Sacken, 1875 MATERIAL. II – 22. VI 1982 , 3♂ , 1♀ (M) ; IV – 2. VI 2015 , 1♀ (M) ; VI – 3.IX 2014, 1♂ , 2♀ (D); VIII – 4.IX 2007, 2♀ (D).