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From Chandler's key. Just the males:

Head and thorax with light grey sheen. Abdomenmainly dull black with apical unbristled part of T1 bearing light grey sheen. Costa before tip of vein Sc slightly arched and vein Sc longer so that cell c is broad and nearly as long as cell sc. Anterior dc not confluent with irregular ph series; the latter and postsutural ia sparse. -> hungarica

Head and thorax dark grey brown dusted, blackish dorsally on scutum and scutellum. Abdomen with lighter dusting on apical part of T1 not strongly contrasted. Costa straight or slightly concave in cell c, which is more asymmetrical
and distinctly shorter than cell sc. Anterior dc confluent with ph series; latter and postsutural ia numerous. -> dorsalis