flying in small aggregations, fluttering over high spots in the yard, temp ~ 55F, Trichocera bimacula (keyed using Pratt, 2003). Photographed under hand sanitizer gel using a cheapo usb microscope. length = ~7mm
Johann Wilhelm Meigen, 1790 Abbildung der europäischen zweiflügeligen Insekten nach der Natur Von Joh. Wilh. Meigen zu Stolberg bei Aachen 1 Taf CLXXXII plate text Valid names and synonyms at Catalogue of Life (Annual Checklist) and Diptera.org Nomenclator.Types at MNHN collections database Note Europäischen Zweiflügeligen includes species described by previous authors - Linnaeus, Fallen, Wiedemann, Fabricius, Scopoli, Forster, Rossi, Macquart, Robert etc.