Just hatched out and trying it's wings!
on platter mushroom (Megacollybia rodmanii) in mixed forest
MINOLTA DIGITAL STILL CAMERA
I am fairly sure this is either clavatus or chrysostomus but I am leaning towards clavatus due to the more opaque wings. Will wait for a second opinion though.
Very large black fly, wasp mimic, reddish band on abdomen