Xanthogramma dives (Rondani, 1857)

Xanthogramma dives (Rondani, 1857) ( Fig. 8)

Material examined. Russia: Moscow Region, Tabolovo env., 55.913381N 36.068807E, edge of mixed forest, 17.06.2017, on flowers of Anthriscus sylvestris , 1 ♀ ( A. Prokhorov) GoogleMaps .

Distribution: at present uncertain, due to confusion with X. pedissequum (Harris, 1776) and X. stackelbergi Violovitsh, 1975 , but authentically known from Andorra, Czech Republic, France, Germany, Hungary, Italy, the Netherlands, Norway, Poland, Portugal, Slovak Republic, Slovenia, Spain, Switzerland ( Belcari et al., 1995; De Groot & Govedič, 2008; Mielczarek, 2009; Tóth, 2011; Van Eck, 2011; Van Steenis, 2011; Ricarte & Marcos-García, 2017; Nedeljković et al., 1918; Speight, 2018; Syrphidae checklists, 2019); Ukraine (Prokhorov et al., in press), Russia ( first record).

Diagnosis. Three species of the genus, X. dives , X. pedissequum and X. stackelbergi , are very similar in appearance. Common characters for them are: the tergite 2 wider than long; alula entirely covered in microtrichia; eye pile very sparse, shorter than the diameter of the anterior ocellus; hind femora black on the apical fourth. Xanthogramma dives can be easily separated from X. pedissequum by the thorax with more than two yellow maculae laterally (in X. pedissequum , thorax with one or two yellow maculae laterally). From X. stackelbergi , it can be distinguished by wing cells r 1 and r 2+3 darkened in the apical part (in X. stackelbergi , wing cells r 1 and r 2+3 hyaline in the apical part). These characters are based on Nedeljković et al. (1918).