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© 2018, © 2018 Taylor & Francis. A new species of the genus Chrysotoxum (Diptera: Syrphidae), Chrysotoxum bozdagensis Nedeljković, Vujić & Hayat sp. n., collected from Bozdağ Mt., İzmir Province, Turkey is described and illustrated. Chrysotoxum bozdagensis sp. n. can be distinguished from the similar Ch. octomaculatum Curtis, 1837 by the presence of a black pile on the mesonotum and the colour of the legs. It is also similar to Ch. elegans Loew, 1841, from which it can be distinguished by the colour of the pile on the vertical triangle and scutellum, as well from the structure of the male genitalia. Additionally, Ch. bozdagensis sp. n. can be clearly distinguished from the latter two species by DNA sequence data. This new species increases the total number of Chrysotoxum species in Turkey to 18. http://www.zoobank.org/urn:lsid:zoobank.org:pub:7465AAEA-21E6-4F0F-984C-CD48BE75436F.

The revision of the saproxylic hoverflies collected in Serbia from 1950 to 2010 has revealed a total of 56 species, of which Sphiximorpha subsessilis (Illiger in Rossi) is new to the Balkan Peninsula and Arctophila superbiens (Muller), Blera fallax (Linnaeus), Brachyopa panzeri Goffe, Brachyopa testacea (Fallen), Brachyopa vittata Zetterstedt and Chalcosyrphus piger (Fabricius) are new to Serbia. According to “Syrph the Net, the database of European Syrphidae”, 16 of the 56 species are threatened with extinction in Europe, while 6 species are “strictly protected” and 13 are “protected” under Serbian legislation. Distribution maps for each species, as well as new data on adult habitats, are provided. The conservation status of the saproxylic hoverflies of Serbia is discussed. The present study attempts to provide a basis for the conservation of the saproxylic hoverflies of this Balkan country.