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Here are some images of a large dark tabanid taken on Lesbos recently. They seemed quite similar to me to the D. anthracinus I photographed in Corsica last year and had identified on this site: http://www.diptera.info/forum/viewthread.php?forum_id=5&thread_id=30716 but I'm pretty sure these Lesbos flies were smaller and on checking the photos closely, the antennae don't look as deeply notched and the wings are more patterned.

The less notched antennae also rules out D. ater I think and they don't look dark enough for D. carbonaria from pics I've seen, so is this another Dasyrhamphis species that I can't find any images of, or is it another genus altogether, possibly Hybomitra?

Hoping for help as usual..

31.5.11 c 11mm Lesbos, Greece on umbels and mint near north coast.

Female profile first: