Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Sepsidae (Black Scavenger Fly)  - Sepsis

Sepsidae (Black Scavenger Fly) - Sepsis
Baiting Hollow, Suffolk County, New York, USA
May 26, 2010
Wing waving display.
Observed on Hosta. Sepsidae?
Similar to this one:

Moved from Flies.

I agree
Sepsid it is, I think you can put it down as Sepsis sp.

For what it's worth...
Sepsidae looks good to this non expert. :)