Review of the Eumerus tricolor species group (Diptera: Syrphidae) in Iran, with description of six new species Author Gilasian, Ebrahim A45912ED-BEEB-4733-AC6E-C22ACAFD6F63 Insect Taxonomy Research Department, Iranian Research Institute of Plant Protection (IRIPP), Agricultural Research, Education and Extension Organization (AREEO), Tehran, 19395 - 1454, Iran. ebrahimgilasian@gmail.com;gilasian@iripp.ir Author Steenis, Jeroen van C7F0D01C-B182-4B93-AF73-E4154367B535 Research Associate NBC-Naturalis, Leiden. % Hof der Toekomst 48, 3823 HX Amersfoort, The Netherlands. jvansteenis@syrphidaeintrees.com Author Parchami-Araghi, Mehrdad 2F788927-E377-471A-B658-9E86A41FC9CA Insect Taxonomy Research Department, Iranian Research Institute of Plant Protection (IRIPP), Agricultural Research, Education and Extension Organization (AREEO), Tehran, 19395 - 1454, Iran. maraghi20@yahoo.ca text European Journal of Taxonomy 2020 2020-11-02 722 106 152 journal article 10.5852/ejt.2020.722.1139 4239287 90B3B475-49D9-4869-8F5F-A788DB880356 Eumerus persicus Stackelberg, 1949 Diagnosis (based on Stackelberg 1961 ) Female Eyes almost bare; face and frontal triangle shiny black, without polinosity; antennae reddish-orange, basoflagellomere oval; scutum and scutellum shiny black, without median pollinose vittae; metafemur distinctly enlarged, mostly orange with exception of black apex; metatibia black; wing hyaline; abdomen predominantly orange. Fig. 15. Head, ♂, dorsal view (A, C, E, G) and lateral view (B, D, F, H). A–B . Eumerus coeruleus ( Becker, 1913 ) , Chekab Valley, Iran (JSA). C–D . E. jacobsoni Becker, 1913 , Chekab Valley, Iran (JSA). E–F . E. kazanovzkyae Paramonov, 1927 , Paveh, Iran (HMIM). G–H . E. longitarsis Peck, 1979 , Chekab Valley, Iran (JSA). Scale bars = 0.5 mm. Male Unknown. Material examined We had no access to any specimen of this species, which was originally described and is exclusively known from Iran ( type locality: Tehran prov. , Damavand). Fig. 16. Head, ♂, dorsal view (A, C, E, G) and lateral view (B, D, F, H). A–B . Eumerus sp., Khash, Iran (HMIM). C–D . E. hissaricus Stackelberg, 1949 , Ghoochan, Iran (HMIM). E–F . E. ovoformus Gilasian & van Steenis sp. nov. , holotype (HMIM). G–H . E. persarum Stackelberg, 1961 , Yazd, Iran (JSA). Scale bars = 0.5 mm. Remarks We failed to collect any specimens of this species during this study and our attempts to access the type material were not fruitful. Based on its diagnostic characters, original description ( Stackelberg 1949 ) and the identification key ( Stackelberg 1961 ), this species is readily separated from other Iranian species studied through this research. Distribution Iran ( Peck 1988 ).