Breve descripción de lo que observaste
Tabanus tergestinus (Egger, 1859) ♀
28 Jun 2015.
Buckingham Springs, Bucks Co, PA.
2.9 mm wing length.
Found on Leucanthemum x superbum.
True flies are insects of the order Diptera (from the Greek di = two, and ptera = wings). Their most obvious distinction from other orders of insects is that a typical fly possesses a pair of flight wings on the mesothorax and a pair of halteres, derived from the hind wings, on the metathorax. (Some species of flies are exceptional in that they are secondarily flightless). The only other order of insects bearing two true, functional...