Criorhina pachymera Egger, 1858

Prokhorov, A. V., Popov, G. V. & Shparyk, V. Yu., 2020, New Records Of Hover Flies (Diptera, Syrphidae) From Ukraine. Iv, Zoodiversity 54 (1), pp. 17-30 : 26-27

Criorhina pachymera Egger, 1858 ( figs 43–46 )

M a t e r i a l e x a m i n e d. Ukraine. Rivne Region: Bushcha env., Mizotskyi Kriazh , 50.3019 N 26.3014 E, old overgrown felling in deciduous forest, 17.05.2018, 1 {(A. Prokhorov) .

D i s t r i but i on: Austria, Belgium, Bosnia-Herzegovina, Croatia, Czech Republic, France, Germany, Greece, Hungary, the Netherlands, Poland, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland ( Peck, 1988; Dirickx, 1994; Holinka & Mazánek, 1997; Vujić et al., 2001; Stănescu & Pârvu, 2005; De Groot & Govedič, 2008; Mielczarek, 2009; Reemer et al., 2009; Tóth, 2011; Williams et al., 2011; Johansson, 2015; Ricarte, & Marcos-García, 2017; Speight, 2018; Wakkie, 2019); Ukraine (first record).

Diagnosis. At first glance, C. pachymera male looks like species of the genus Brachypalpus Macquart, 1834 . Among European species of the genus Criorhina Meigen, 1822 , it is most similar to C. asilica (Fallén, 1816) , C.brevipila Loew,1871 , and C. floccosa (Meigen, 1822) , all mimicking bees. Criorhina pachymera can be distinguished from C. floccosa by the hairy katepimeron (in C. floccosa , katepimeron is bare). C. pachymera clearly differs from C. asilica and C. brevipila by hind femur thickened, <5× as long as their maximum width ( fig. 45 ) (in C. asilica and C. brevipila , hind femur slender,> 6× as long as their maximum width).

Note. Listed as a threatened species on the Balkan Peninsula by Vujić et al. (2001).

Figures

Figs 43–46. Criorhina pachymera male: 43 — habitus, dorsal view; 44 — habitus, lateral view; 45 — hind leg, lateral view; 46 — head, frontal view.