Right on cue, straight after Christmas...
Yes, this is a female Queensland Fruit Fly, which I swatted as she laid eggs in this quince. Yep, those are her guts hanging out. Sorry if you have just eaten.
This is a big fly, about 8mm long. She is a maroon colour with oval yellow markings, and has a wasp-waist.
Notice that she was laying the eggs into a crease in the fruit, to make the 'sting' less obvious?
I bagged about a dozen quinces in those nice white veils, but pulled off at least 20 other fruit -- the smaller and less shapely ones -- and solarised them. The remaining quinces should grow bigger -- assuming that QFF haven't already struck them!