Balloon Fly (Family: Brachystomatidae)

A very active fly about 5 or 6 mm long. Head and thorax were black and the thorax showed two faint thin white lines. The head had two short pointed black antennae that were either held straight up like horns or slicked back.
A long proboscis was out lapping up the nectar on the flower disc. The abdomen was a raspberry red with faint white lines. The last segment was black and the two anterior to this were white.
Legs were black and long. The wings were tinted black but plain.